🖼️ Black Trigram (흑괘)

February 20, 2026 · View on GitHub

🔐 ISMS Alignment: This document follows Hack23 Secure Development Policy asset management requirements.

Below is a focused breakdown of exactly which art‐ and animation‐related assets you’ll need for:

Backgrounds (especially the Intro/Main Menu & Dojang/Training Hall),
UI Icons (stances, trigrams, HUD elements), and
Technique Animations (attack, hit, finisher sequences)

Additionally, we call out the Pixi.js modules (dependencies) you’ll actually use when wiring everything together in code. Think of this as a “shopping list” for your 2D combat game’s art and animation pipeline, paired with the Pixi features you’ll need to load, display, and animate them.

CURRENT ASSETS Available

Asset Audit

Run npm run audit:assets to verify all visual asset references in the codebase point to existing files. This ensures no broken asset links and helps maintain asset integrity.

public/assets/visual
public/assets/visual/archetypes
public/assets/visual/archetypes/amsalja.png
public/assets/visual/archetypes/hacker.png
public/assets/visual/archetypes/jeongbo_yowon.png
public/assets/visual/archetypes/jojik_pokryeokbae.png
public/assets/visual/archetypes/musa.png
public/assets/visual/bg
public/assets/visual/bg/archetyples
public/assets/visual/bg/archetyples/CyberpunkTeamDynamics.png
public/assets/visual/bg/archetyples/PlayerArchetypesExplained.png
public/assets/visual/bg/archetyples/PlayerArchetypesOverview.png
public/assets/visual/bg/dojang
public/assets/visual/bg/dojang/dojang_floor_tex.png
public/assets/visual/bg/dojang/dojang_wall_tex.png
public/assets/visual/bg/intro
public/assets/visual/bg/intro/intro_bg_loop.png
public/assets/visual/logo
public/assets/visual/logo/black-trigram-256.png
public/assets/visual/logo/black-trigram.png
---

## 1. Backgrounds & Environments

### 1.1 Intro / Main Menu Background

- **Asset Name:** `intro_bg_loop.png`

  - **Description:** A seamless 1920×1080 loopable tile of a rain‐slicked concrete floor with neon pipes and drifting data‐line grid.
  - **File Format:** PNG (plus normal/roughness if you want subtle 3D lighting on flat sprites, but PNG is usually enough).
  - **Folder:** `assets/visual/bg/intro/`
  - **Visual Style Notes:**

    - Base color: Obsidian (`#0A0F12`) with subtle film‐grain overlay.
    - Neon accents: teal/cyan reflections on puddles, flickering Hangul glyphs on pipes.
    - Animation: small “rain drip” loop in shader or flipbook.

- **Asset Name:** `mainmenu_foreground_overlay.png`

  - **Description:** A semi‐transparent obsidian vignette (20px “soft edge”) to darken screen edges, helping text/logo pop.
  - **File Format:** PNG (alpha)
  - **Folder:** `assets/visual/overlays/`
  - **Usage:** Placed above `intro_bg_loop` to darken corners.

### 1.2 Dojang / Training Hall Background

- **Asset Name:** `dojang_floor_tex.png`

  - **Description:** 2048×2048 PBR‐style image of matte‐black tatami mats, with subtle water puddle normals (if you want dynamic reflections).
  - **File Format:** PNG (or PNG + normal/roughness if desired)
  - **Folder:** `assets/visual/bg/dojang/`
  - **Style Notes:**

    - Tileable so it can fill any resolution.
    - Slight neon cyan reflections at edges where wall meets floor.

- **Asset Name:** `dojang_wall_tex.png`

  - **Description:** 1024×1024 tile of corrugated metal with pipelines and emissive Hangul trigrams (☰, ☲, etc.) behind semi‐opaque panels.
  - **File Format:** PNG (with separate emissive mask channel if you plan to animate neon flicker).
  - **Folder:** `assets/visual/bg/dojang/`
  - **Style Notes:**

    - The emissive mask will let you “pulse” each trigram glyph via a simple shader or a flicker sprite.

- **Asset Name:** `dojang_wall_neon_flicker.png` (optional flipbook)

  - **Description:** A small flipbook (e.g. 4 frames at 256×256) showing a neon glyph flicker (cycle through 0%, 50%, 100% brightness).
  - **File Format:** PNG sprite sheet
  - **Folder:** `assets/vfx/animations/`

- **Asset Name:** `training_console_model.png`

  - **Description:** 512×512 stylized grayscale sprite of a holo‐console (flat sprite) with cyan emissive accents (for real‐time data display).
  - **File Format:** PNG
  - **Folder:** `assets/visual/props/`
  - **Notes:** Use this as a static background element; you can overlay bitmaps of gauge bars, or simply let the console glow.

- **Asset Name:** `stance_pad_circle.png`

  - **Description:** 256×256 semi‐transparent PNG of a glowing floor circle. Pulses from 0 → 100% opacity in a 1s loop.
  - **File Format:** PNG (alpha)
  - **Folder:** `assets/visual/props/`

---

## 2. UI Icons & HUD Elements

### 2.1 Stance Icons

Each icon is a 64×64 px SVG (so it scales crisply). We’ll load them as textures in Pixi and tint/animate as needed.

1. **`icon_stance_defensive.svg`**

   - Outline style in Slate Gray (`#2E3538`) when inactive.
   - Filled with Teal Neon (`#00FFC8`) + soft glow when active.

2. **`icon_stance_balanced.svg`**

   - Outline in Slate Gray; filled with Teal Neon on hover/active.

3. **`icon_stance_aggressive.svg`**

   - Outline in Slate Gray; filled with Crimson (`#FF0044`) on “charged” or “ready” state, or Teal Neon when selected.

   **Folder:** `assets/ui/icons/stances/`

### 2.2 Trigram Icons

- **File Names:**

icon_trigram_1.svg icon_trigram_2.svg … icon_trigram_8.svg ``$

\text{Each} \text{icon}: 48 \times 48 \text{px}, \text{dark} \text{background} (\text{Gunmetal} $#424A50`) with the trigram glyph in Teal Neon.
States:
- Inactive: no glow, just basic fill.
- Active: slight outer glow + subtle 1.1× scale “pulse.”
- Hover: 1.05× scale + quick glow (0.2 s).
Folder: assets/ui/icons/trigrams/

2.3 HUD Bars & Overlays

hud_health_bar.png (800×32 px PNG)
- 10 segmented blocks. Each filled segment is Cyan Glow (#1BE7FF); empty is Slate Gray.
- Folder: assets/ui/hud/
hud_pain_bar.png (800×16 px PNG)
- 10 segments. Filled segments are Crimson (#FF0044); empty Slate Gray.
- Folder: assets/ui/hud/
ui_button_start_idle.png & ui_button_start_hover.png (256×64 px each)
- Idle: Slate Gray panel with “▶ Start Combat” in Hangul+English.
- Hover: Underline in Teal Neon + icon (“▶”) glows.
- Folder: assets/ui/buttons/
ui_panel_slate.png (1024×512 px)
- A semi-opaque Slate Gray panel (70% opacity) with a subtle noise texture.
- Folder: assets/ui/panels/
tooltip_arrow.png (32×32 px PNG)
- Small triangle arrow in Cyan Glow for tooltips.
- Folder: assets/ui/tooltips/

3. Technique Animations (AnimatedSprite Sprite Sheets)

Any time you see code like:

await Assets.load("path/to/spritesheet.json");
const frames = [];
for (let i = 0; i < N; i++) {
  frames.push(Texture.from(`frame${i}.png`));
}
const anim = new AnimatedSprite(frames);

…you need a sprite sheet JSON + corresponding PNG atlas for each “technique.” Below is a minimal required set of technique animations:

3.1 Light Strike Animation (All Archetypes)

Sprite Sheet JSON: strike_light_spritesheet.json
Texture Atlas: strike_light_spritesheet.png (e.g., 512×512 containing all 6 frames laid out in a grid).
Frame Count: 6 frames, each ~128×256 (portrait orientation).
Animation Speed: 0.6 (adjust per archetype).
Visual Content: Character winds up → quick punch/kick → recoil. No background in atlas (transparent).
Folder: assets/characters/animations/techniques/light/

3.2 Medium Strike Animation

Sprite Sheet JSON: strike_medium_spritesheet.json
Texture Atlas: strike_medium_spritesheet.png (6–8 frames, ~128×256 each).
Description: More wind-up, more impact frames, a small dust puff frame integrated (see VFX).
Folder: assets/characters/animations/techniques/medium/

3.3 Heavy Strike Animation

Sprite Sheet JSON: strike_heavy_spritesheet.json
Texture Atlas: strike_heavy_spritesheet.png (8 frames, ~256×256 each).
Description: Big wind-up, slow-mo pause on impact, splash of embedded VFX dust/blood.
Folder: assets/characters/animations/techniques/heavy/

3.4 Critical Strike / Finisher Animation

Sprite Sheet JSON: strike_critical_spritesheet.json
Texture Atlas: strike_critical_spritesheet.png (10–12 frames, ~256×256).
Description: Slow-mo bone-breaking blow → flash frame → slowdown.
Folder: assets/characters/animations/techniques/critical/

3.5 Dodge / Evade Animation

Sprite Sheet JSON: dodge_spritesheet.json
Texture Atlas: dodge_spritesheet.png (4–6 frames, ~128×256).
Description: Quick sidestep/backflip frames, subtle afterimage.
Folder: assets/characters/animations/techniques/dodge/

3.6 Block / Parry Animation

Sprite Sheet JSON: block_spritesheet.json
Texture Atlas: block_spritesheet.png (5 frames, ~128×256).
Description: Character raises arm/weapon to block → recoil if successful.
Folder: assets/characters/animations/techniques/block/

3.7 Hit Reaction Animation

Sprite Sheet JSON: hit_reaction_spritesheet.json
Texture Atlas: hit_reaction_spritesheet.png (4 frames, ~128×256).
Description: Character flinches backwards, tinted red on final frame.
Folder: assets/characters/animations/techniques/hit/

3.8 Finisher Sequence (All Archetypes)

Sprite Sheet JSON: finisher_musa_spritesheet.json, finisher_amsalja_spritesheet.json, etc.
Texture Atlas: finisher_musa_spritesheet.png (12 frames, ~256×256), etc.
Description: A multi-stage “cinematic” finisher (pause → bone crushing → slow fade).
Folder: assets/characters/animations/finisher/

4. Pixi.js Dependencies & Modules Needed

Below is a minimal list of Pixi.js modules (from pixi.js/lib) that you will rely on to load, animate, and render everything above. In your package.json, you’ve already installed pixi.js. At runtime, you’ll import exactly the pieces you use:

import {
  Application,
  TickerPlugin, // core ticker
  ResizePlugin, // auto resizes to window
  Assets, // for loading JSON/PNG atlases
  Texture,
  Sprite,
  AnimatedSprite,
  Container,
  TilingSprite, // if you want parallax/tiled backgrounds
  Loader, // older API if you prefer Loader instead of Assets
} from "pixi.js";

Application (from app/Application.mjs)
- Creates the Pixi canvas, WebGL context, stage, etc.
TickerPlugin & ResizePlugin
- Ensures your app’s ticker (main game loop) and auto-resize functionality.

Assets (from assets/Assets.mjs)

The new recommended loader for JSON sprite sheets, PNGs, audio, etc.

Example:

await Assets.load(
  "assets/characters/animations/techniques/light/strike_light_spritesheet.json"
);

Texture (from rendering/texture/Texture.mjs)
- Create textures from loaded assets:
```
const frameTex = Texture.from("strike_light_000.png");
```
Sprite & AnimatedSprite (from scene/sprite/Sprite.mjs & scene/sprite-animated/AnimatedSprite.mjs)
- Sprite for static images (UI icons, backgrounds).
- AnimatedSprite for flipbook animations (techniques, VFX).
Container (from scene/container/Container.mjs)
- Use a parent Container for grouping layers:
  - backgroundContainer
  - characterContainer
  - uiContainer
  - vfxContainer
TilingSprite (from scene/sprite-tiling/TilingSprite.mjs)
- If you want to scroll/loop the intro_bg_loop.png or tile dojang_floor_tex.png seamlessly across a larger stage.
Loader (from assets/loader/Loader.mjs)
- If you prefer the older PIXI.Loader API to Assets. Both are possible; Assets is recommended for newer Pixi versions.
Filter / BlurFilter / DisplacementFilter (from filters/defaults/*)
- Useful for adding real-time blur afterimages (for dodge), screen shakes, or ripples when powering up Ki (ki_charge).

5. Directory Structure & Final Checklist

Below is a consolidated folder structure showing where each of the above assets live. This is what your repo (or build pipeline) needs before you start coding the Pixi setup:

/assets
│
├─ characters/
│  ├─ animations/
│  │   ├─ techniques/
│  │   │   ├─ light/
│  │   │   │   ├─ strike_light_spritesheet.json
│  │   │   │   └─ strike_light_spritesheet.png
│  │   │   ├─ medium/
│  │   │   │   ├─ strike_medium_spritesheet.json
│  │   │   │   └─ strike_medium_spritesheet.png
│  │   │   ├─ heavy/
│  │   │   │   ├─ strike_heavy_spritesheet.json
│  │   │   │   └─ strike_heavy_spritesheet.png
│  │   │   ├─ critical/
│  │   │   │   ├─ strike_critical_spritesheet.json
│  │   │   │   └─ strike_critical_spritesheet.png
│  │   │   ├─ dodge/
│  │   │   │   ├─ dodge_spritesheet.json
│  │   │   │   └─ dodge_spritesheet.png
│  │   │   ├─ block/
│  │   │   │   ├─ block_spritesheet.json
│  │   │   │   └─ block_spritesheet.png
│  │   │   └─ hit/
│  │   │       ├─ hit_reaction_spritesheet.json
│  │   │       └─ hit_reaction_spritesheet.png
│  │   └─ finisher/
│  │       ├─ musa_finisher_spritesheet.json
│  │       └─ musa_finisher_spritesheet.png
│  │       ├─ amsalja_finisher_spritesheet.json
│  │       └─ amsalja_finisher_spritesheet.png
│  │       └─ … (one per archetype)
│  └─ portraits/
│      ├─ portrait_musa.png
│      ├─ portrait_amsalja.png
│      └─ … (other archetypes)
│
├─ fonts/
│  ├─ BlackTrigram-Hangul.woff2
│  ├─ NotoSansKR-Regular.woff2
│  └─ Roboto-Regular.woff2
│
├─ i18n/
│  ├─ ko.json
│  └─ en.json
│
├─ props/
│  ├─ training_console_model.png
│  ├─ stance_pad_circle.png
│  └─ dummy_target_overlay.svg
│
├─ shaders/
│  ├─ rim_light.shader
│  ├─ blood_decal.shader
│  └─ neon_flicker.shader
│
├─ ui/
│  ├─ buttons/
│  │   ├─ ui_button_start_idle.png
│  │   └─ ui_button_start_hover.png
│  ├─ icons/
│  │   ├─ stances/
│  │   │   ├─ icon_stance_defensive.svg
│  │   │   ├─ icon_stance_balanced.svg
│  │   │   └─ icon_stance_aggressive.svg
│  │   ├─ trigrams/
│  │   │   ├─ icon_trigram_1.svg
│  │   │   ├─ icon_trigram_2.svg
│  │   │   └─ … up to icon_trigram_8.svg
│  │   └─ tooltip_arrow.png
│  └─ hud/
│      ├─ hud_health_bar.png
│      └─ hud_pain_bar.png
│
├─ vfx/
│  ├─ animations/
│  │   ├─ anim_logo_pulse.json
│  │   ├─ anim_menu_slide_0.png … anim_menu_slide_7.png
│  │   ├─ anim_strike_impact_0.png … anim_strike_impact_15.png
│  │   └─ anim_finisher_musa_0.png … anim_finisher_musa_11.png
│  ├─ particles/
│  │   ├─ vfx_dust_puff.png
│  │   ├─ vfx_blood_splatter.png
│  │   └─ confetti_sprites.png
│  └─ shaders/
│      ├─ vfx_impact_ring.png
│      ├─ vfx_neon_glow.png
│      └─ vfx_critical_flash.png
│
├─ visual/
│  ├─ bg/
│  │   ├─ intro/
│  │   │   ├─ intro_bg_loop.png
│  │   │   └─ mainmenu_foreground_overlay.png
│  │   └─ dojang/
│  │       ├─ dojang_floor_tex.png
│  │       └─ dojang_wall_tex.png
│  └─ overlays/
│      ├─ vital_region_head.png
│      ├─ vital_region_neck.png
│      ├─ vital_region_torso.png
│      ├─ vital_region_arms.png
│      ├─ vital_region_chest.png
│      └─ vital_region_legs.png
│
└─ public/
   └─ assets/
       └─ audio/
           ├─ music/
           │   ├─ intro_theme.webm
           │   ├─ combat_theme.webm
           │   ├─ combat_theme_geon.webm
           │   ├─ training_theme.webm
           │   ├─ meditation_theme.webm
           │   ├─ victory_theme.webm
           │   ├─ underground_rave_theme.webm
           │   └─ ambient_loop.webm
           └─ sfx/
               ├─ ambient/
               │   ├─ dojang_ambience.webm
               │   ├─ wind_effect.webm
               │   └─ dojo_crowd.webm
               ├─ attacks/
               │   ├─ attack_punch_light.webm
               │   ├─ attack_punch_medium.webm
               │   ├─ attack_kick_heavy.webm
               │   ├─ attack_light.webm
               │   ├─ attack_medium.webm
               │   ├─ attack_critical.webm
               │   ├─ attack_special_geon.webm
               │   ├─ dodge.webm
               │   ├─ block_success.webm
               │   ├─ block_break.webm
               │   └─ perfect_strike.webm
               ├─ hit/
               │   ├─ hit_light.webm
               │   ├─ hit_medium.webm
               │   ├─ hit_heavy.webm
               │   ├─ hit_critical.webm
               │   ├─ hit_flesh.webm
               │   └─ hit_block.webm
               ├─ combo/
               │   ├─ combo_buildup.webm
               │   ├─ combo_finish.webm
               │   └─ energy_pulse.webm
               ├─ match/
               │   ├─ match_start.webm
               │   ├─ countdown.webm
               │   ├─ match_end.webm
               │   ├─ victory.webm
               │   └─ defeat.webm
               ├─ movement/
               │   ├─ footstep.webm
               │   └─ stance_change.webm
               ├─ ki/
               │   ├─ ki_charge.webm
               │   └─ ki_release.webm
               ├─ stamina/
               │   └─ stamina_depleted.webm
               ├─ health/
               │   └─ health_low.webm
               └─ ui/
                   ├─ menu_click.webm
                   ├─ menu_navigate.webm
                   ├─ menu_select.webm
                   ├─ menu_hover.webm
                   └─ menu_back.webm

1. Backgrounds & Environments

Asset Name: intro_bg_loop.png
- Description: A seamless 1920×1080 loopable tile of a rain‐slicked concrete floor with neon pipes and drifting data‐line grid.
- File Format: PNG (plus normal/roughness if you want subtle 3D lighting on flat sprites, but PNG is usually enough).
- Folder: assets/visual/bg/intro/
- Visual Style Notes:
  - Base color: Obsidian (#0A0F12) with subtle film‐grain overlay.
  - Neon accents: teal/cyan reflections on puddles, flickering Hangul glyphs on pipes.
  - Animation: small “rain drip” loop in shader or flipbook.
Asset Name: mainmenu_foreground_overlay.png
- Description: A semi‐transparent obsidian vignette (20px “soft edge”) to darken screen edges, helping text/logo pop.
- File Format: PNG (alpha)
- Folder: assets/visual/overlays/
- Usage: Placed above intro_bg_loop to darken corners.

1.2 Dojang / Training Hall Background

Asset Name: dojang_floor_tex.png
- Description: 2048×2048 PBR‐style image of matte‐black tatami mats, with subtle water puddle normals (if you want dynamic reflections).
- File Format: PNG (or PNG + normal/roughness if desired)
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - Tileable so it can fill any resolution.
  - Slight neon cyan reflections at edges where wall meets floor.
Asset Name: dojang_wall_tex.png
- Description: 1024×1024 tile of corrugated metal with pipelines and emissive Hangul trigrams (☰, ☲, etc.) behind semi‐opaque panels.
- File Format: PNG (with separate emissive mask channel if you plan to animate neon flicker).
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - The emissive mask will let you “pulse” each trigram glyph via a simple shader or a flicker sprite.
Asset Name: dojang_wall_neon_flicker.png (optional flipbook)
- Description: A small flipbook (e.g. 4 frames at 256×256) showing a neon glyph flicker (cycle through 0%, 50%, 100% brightness).
- File Format: PNG sprite sheet
- Folder: assets/vfx/animations/
Asset Name: training_console_model.png
- Description: 512×512 stylized grayscale sprite of a holo‐console (flat sprite) with cyan emissive accents (for real‐time data display).
- File Format: PNG
- Folder: assets/visual/props/
- Notes: Use this as a static background element; you can overlay bitmaps of gauge bars, or simply let the console glow.
Asset Name: stance_pad_circle.png
- Description: 256×256 semi‐transparent PNG of a glowing floor circle. Pulses from 0 → 100% opacity in a 1s loop.
- File Format: PNG (alpha)
- Folder: assets/visual/props/

2. UI Icons & HUD Elements

2.1 Stance Icons

Each icon is a 64×64 px SVG (so it scales crisply). We’ll load them as textures in Pixi and tint/animate as needed.

icon_stance_defensive.svg
- Outline style in Slate Gray (#2E3538) when inactive.
- Filled with Teal Neon (#00FFC8) + soft glow when active.
icon_stance_balanced.svg
- Outline in Slate Gray; filled with Teal Neon on hover/active.
icon_stance_aggressive.svg
- Outline in Slate Gray; filled with Crimson (#FF0044) on “charged” or “ready” state, or Teal Neon when selected.
Folder: assets/ui/icons/stances/

2.2 Trigram Icons

File Names:

icon_trigram_1.svg
icon_trigram_2.svg
…
icon_trigram_8.svg
``$

\text{Each} \text{icon}: 48 \times 48 \text{px}, \text{dark} \text{background} (\text{Gunmetal} $#424A50`) with the trigram glyph in Teal Neon.
States:
- Inactive: no glow, just basic fill.
- Active: slight outer glow + subtle 1.1× scale “pulse.”
- Hover: 1.05× scale + quick glow (0.2 s).
Folder: assets/ui/icons/trigrams/

2.3 HUD Bars & Overlays

hud_health_bar.png (800×32 px PNG)
- 10 segmented blocks. Each filled segment is Cyan Glow (#1BE7FF); empty is Slate Gray.
- Folder: assets/ui/hud/
hud_pain_bar.png (800×16 px PNG)
- 10 segments. Filled segments are Crimson (#FF0044); empty Slate Gray.
- Folder: assets/ui/hud/
ui_button_start_idle.png & ui_button_start_hover.png (256×64 px each)
- Idle: Slate Gray panel with “▶ Start Combat” in Hangul+English.
- Hover: Underline in Teal Neon + icon (“▶”) glows.
- Folder: assets/ui/buttons/
ui_panel_slate.png (1024×512 px)
- A semi-opaque Slate Gray panel (70% opacity) with a subtle noise texture.
- Folder: assets/ui/panels/
tooltip_arrow.png (32×32 px PNG)
- Small triangle arrow in Cyan Glow for tooltips.
- Folder: assets/ui/tooltips/

3. Technique Animations (AnimatedSprite Sprite Sheets)

Any time you see code like:

await Assets.load("path/to/spritesheet.json");
const frames = [];
for (let i = 0; i < N; i++) {
  frames.push(Texture.from(`frame${i}.png`));
}
const anim = new AnimatedSprite(frames);

…you need a sprite sheet JSON + corresponding PNG atlas for each “technique.” Below is a minimal required set of technique animations:

3.1 Light Strike Animation (All Archetypes)

Sprite Sheet JSON: strike_light_spritesheet.json
Texture Atlas: strike_light_spritesheet.png (e.g., 512×512 containing all 6 frames laid out in a grid).
Frame Count: 6 frames, each ~128×256 (portrait orientation).
Animation Speed: 0.6 (adjust per archetype).
Visual Content: Character winds up → quick punch/kick → recoil. No background in atlas (transparent).
Folder: assets/characters/animations/techniques/light/

3.2 Medium Strike Animation

Sprite Sheet JSON: strike_medium_spritesheet.json
Texture Atlas: strike_medium_spritesheet.png (6–8 frames, ~128×256 each).
Description: More wind-up, more impact frames, a small dust puff frame integrated (see VFX).
Folder: assets/characters/animations/techniques/medium/

3.3 Heavy Strike Animation

Sprite Sheet JSON: strike_heavy_spritesheet.json
Texture Atlas: strike_heavy_spritesheet.png (8 frames, ~256×256 each).
Description: Big wind-up, slow-mo pause on impact, splash of embedded VFX dust/blood.
Folder: assets/characters/animations/techniques/heavy/

3.4 Critical Strike / Finisher Animation

Sprite Sheet JSON: strike_critical_spritesheet.json
Texture Atlas: strike_critical_spritesheet.png (10–12 frames, ~256×256).
Description: Slow-mo bone-breaking blow → flash frame → slowdown.
Folder: assets/characters/animations/techniques/critical/

3.5 Dodge / Evade Animation

Sprite Sheet JSON: dodge_spritesheet.json
Texture Atlas: dodge_spritesheet.png (4–6 frames, ~128×256).
Description: Quick sidestep/backflip frames, subtle afterimage.
Folder: assets/characters/animations/techniques/dodge/

3.6 Block / Parry Animation

Sprite Sheet JSON: block_spritesheet.json
Texture Atlas: block_spritesheet.png (5 frames, ~128×256).
Description: Character raises arm/weapon to block → recoil if successful.
Folder: assets/characters/animations/techniques/block/

3.7 Hit Reaction Animation

Sprite Sheet JSON: hit_reaction_spritesheet.json
Texture Atlas: hit_reaction_spritesheet.png (4 frames, ~128×256).
Description: Character flinches backwards, tinted red on final frame.
Folder: assets/characters/animations/techniques/hit/

3.8 Finisher Sequence (All Archetypes)

Sprite Sheet JSON: finisher_musa_spritesheet.json, finisher_amsalja_spritesheet.json, etc.
Texture Atlas: finisher_musa_spritesheet.png (12 frames, ~256×256), etc.
Description: A multi-stage “cinematic” finisher (pause → bone crushing → slow fade).
Folder: assets/characters/animations/finisher/

4. Pixi.js Dependencies & Modules Needed

import {
  Application,
  TickerPlugin, // core ticker
  ResizePlugin, // auto resizes to window
  Assets, // for loading JSON/PNG atlases
  Texture,
  Sprite,
  AnimatedSprite,
  Container,
  TilingSprite, // if you want parallax/tiled backgrounds
  Loader, // older API if you prefer Loader instead of Assets
} from "pixi.js";

Application (from app/Application.mjs)
- Creates the Pixi canvas, WebGL context, stage, etc.
TickerPlugin & ResizePlugin
- Ensures your app’s ticker (main game loop) and auto-resize functionality.

Assets (from assets/Assets.mjs)

The new recommended loader for JSON sprite sheets, PNGs, audio, etc.

Example:

await Assets.load(
  "assets/characters/animations/techniques/light/strike_light_spritesheet.json"
);

Texture (from rendering/texture/Texture.mjs)
- Create textures from loaded assets:
```
const frameTex = Texture.from("strike_light_000.png");
```
Sprite & AnimatedSprite (from scene/sprite/Sprite.mjs & scene/sprite-animated/AnimatedSprite.mjs)
- Sprite for static images (UI icons, backgrounds).
- AnimatedSprite for flipbook animations (techniques, VFX).
Container (from scene/container/Container.mjs)
- Use a parent Container for grouping layers:
  - backgroundContainer
  - characterContainer
  - uiContainer
  - vfxContainer
TilingSprite (from scene/sprite-tiling/TilingSprite.mjs)
- If you want to scroll/loop the intro_bg_loop.png or tile dojang_floor_tex.png seamlessly across a larger stage.
Loader (from assets/loader/Loader.mjs)
- If you prefer the older PIXI.Loader API to Assets. Both are possible; Assets is recommended for newer Pixi versions.
Filter / BlurFilter / DisplacementFilter (from filters/defaults/*)
- Useful for adding real-time blur afterimages (for dodge), screen shakes, or ripples when powering up Ki (ki_charge).

5. Directory Structure & Final Checklist

Below is a consolidated folder structure showing where each of the above assets live. This is what your repo (or build pipeline) needs before you start coding the Pixi setup:

/assets
│
├─ characters/
│  ├─ animations/
│  │   ├─ techniques/
│  │   │   ├─ light/
│  │   │   │   ├─ strike_light_spritesheet.json
│  │   │   │   └─ strike_light_spritesheet.png
│  │   │   ├─ medium/
│  │   │   │   ├─ strike_medium_spritesheet.json
│  │   │   │   └─ strike_medium_spritesheet.png
│  │   │   ├─ heavy/
│  │   │   │   ├─ strike_heavy_spritesheet.json
│  │   │   │   └─ strike_heavy_spritesheet.png
│  │   │   ├─ critical/
│  │   │   │   ├─ strike_critical_spritesheet.json
│  │   │   │   └─ strike_critical_spritesheet.png
│  │   │   ├─ dodge/
│  │   │   │   ├─ dodge_spritesheet.json
│  │   │   │   └─ dodge_spritesheet.png
│  │   │   ├─ block/
│  │   │   │   ├─ block_spritesheet.json
│  │   │   │   └─ block_spritesheet.png
│  │   │   └─ hit/
│  │   │       ├─ hit_reaction_spritesheet.json
│  │   │       └─ hit_reaction_spritesheet.png
│  │   └─ finisher/
│  │       ├─ musa_finisher_spritesheet.json
│  │       └─ musa_finisher_spritesheet.png
│  │       ├─ amsalja_finisher_spritesheet.json
│  │       └─ amsalja_finisher_spritesheet.png
│  │       └─ … (one per archetype)
│  └─ portraits/
│      ├─ portrait_musa.png
│      ├─ portrait_amsalja.png
│      └─ … (other archetypes)
│
├─ fonts/
│  ├─ BlackTrigram-Hangul.woff2
│  ├─ NotoSansKR-Regular.woff2
│  └─ Roboto-Regular.woff2
│
├─ i18n/
│  ├─ ko.json
│  └─ en.json
│
├─ props/
│  ├─ training_console_model.png
│  ├─ stance_pad_circle.png
│  └─ dummy_target_overlay.svg
│
├─ shaders/
│  ├─ rim_light.shader
│  ├─ blood_decal.shader
│  └─ neon_flicker.shader
│
├─ ui/
│  ├─ buttons/
│  │   ├─ ui_button_start_idle.png
│  │   └─ ui_button_start_hover.png
│  ├─ icons/
│  │   ├─ stances/
│  │   │   ├─ icon_stance_defensive.svg
│  │   │   ├─ icon_stance_balanced.svg
│  │   │   └─ icon_stance_aggressive.svg
│  │   ├─ trigrams/
│  │   │   ├─ icon_trigram_1.svg
│  │   │   ├─ icon_trigram_2.svg
│  │   │   └─ … up to icon_trigram_8.svg
│  │   └─ tooltip_arrow.png
│  └─ hud/
│      ├─ hud_health_bar.png
│      └─ hud_pain_bar.png
│
├─ vfx/
│  ├─ animations/
│  │   ├─ anim_logo_pulse.json
│  │   ├─ anim_menu_slide_0.png … anim_menu_slide_7.png
│  │   ├─ anim_strike_impact_0.png … anim_strike_impact_15.png
│  │   └─ anim_finisher_musa_0.png … anim_finisher_musa_11.png
│  ├─ particles/
│  │   ├─ vfx_dust_puff.png
│  │   ├─ vfx_blood_splatter.png
│  │   └─ confetti_sprites.png
│  └─ shaders/
│      ├─ vfx_impact_ring.png
│      ├─ vfx_neon_glow.png
│      └─ vfx_critical_flash.png
│
├─ visual/
│  ├─ bg/
│  │   ├─ intro/
│  │   │   ├─ intro_bg_loop.png
│  │   │   └─ mainmenu_foreground_overlay.png
│  │   └─ dojang/
│  │       ├─ dojang_floor_tex.png
│  │       └─ dojang_wall_tex.png
│  └─ overlays/
│      ├─ vital_region_head.png
│      ├─ vital_region_neck.png
│      ├─ vital_region_torso.png
│      ├─ vital_region_arms.png
│      ├─ vital_region_chest.png
│      └─ vital_region_legs.png
│
└─ public/
   └─ assets/
       └─ audio/
           ├─ music/
           │   ├─ intro_theme.webm
           │   ├─ combat_theme.webm
           │   ├─ combat_theme_geon.webm
           │   ├─ training_theme.webm
           │   ├─ meditation_theme.webm
           │   ├─ victory_theme.webm
           │   ├─ underground_rave_theme.webm
           │   └─ ambient_loop.webm
           └─ sfx/
               ├─ ambient/
               │   ├─ dojang_ambience.webm
               │   ├─ wind_effect.webm
               │   └─ dojo_crowd.webm
               ├─ attacks/
               │   ├─ attack_punch_light.webm
               │   ├─ attack_punch_medium.webm
               │   ├─ attack_kick_heavy.webm
               │   ├─ attack_light.webm
               │   ├─ attack_medium.webm
               │   ├─ attack_critical.webm
               │   ├─ attack_special_geon.webm
               │   ├─ dodge.webm
               │   ├─ block_success.webm
               │   ├─ block_break.webm
               │   └─ perfect_strike.webm
               ├─ hit/
               │   ├─ hit_light.webm
               │   ├─ hit_medium.webm
               │   ├─ hit_heavy.webm
               │   ├─ hit_critical.webm
               │   ├─ hit_flesh.webm
               │   └─ hit_block.webm
               ├─ combo/
               │   ├─ combo_buildup.webm
               │   ├─ combo_finish.webm
               │   └─ energy_pulse.webm
               ├─ match/
               │   ├─ match_start.webm
               │   ├─ countdown.webm
               │   ├─ match_end.webm
               │   ├─ victory.webm
               │   └─ defeat.webm
               ├─ movement/
               │   ├─ footstep.webm
               │   └─ stance_change.webm
               ├─ ki/
               │   ├─ ki_charge.webm
               │   └─ ki_release.webm
               ├─ stamina/
               │   └─ stamina_depleted.webm
               ├─ health/
               │   └─ health_low.webm
               └─ ui/
                   ├─ menu_click.webm
                   ├─ menu_navigate.webm
                   ├─ menu_select.webm
                   ├─ menu_hover.webm
                   └─ menu_back.webm

1. Backgrounds & Environments

Asset Name: intro_bg_loop.png
- Description: A seamless 1920×1080 loopable tile of a rain‐slicked concrete floor with neon pipes and drifting data‐line grid.
- File Format: PNG (plus normal/roughness if you want subtle 3D lighting on flat sprites, but PNG is usually enough).
- Folder: assets/visual/bg/intro/
- Visual Style Notes:
  - Base color: Obsidian (#0A0F12) with subtle film‐grain overlay.
  - Neon accents: teal/cyan reflections on puddles, flickering Hangul glyphs on pipes.
  - Animation: small “rain drip” loop in shader or flipbook.
Asset Name: mainmenu_foreground_overlay.png
- Description: A semi‐transparent obsidian vignette (20px “soft edge”) to darken screen edges, helping text/logo pop.
- File Format: PNG (alpha)
- Folder: assets/visual/overlays/
- Usage: Placed above intro_bg_loop to darken corners.

1.2 Dojang / Training Hall Background

Asset Name: dojang_floor_tex.png
- Description: 2048×2048 PBR‐style image of matte‐black tatami mats, with subtle water puddle normals (if you want dynamic reflections).
- File Format: PNG (or PNG + normal/roughness if desired)
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - Tileable so it can fill any resolution.
  - Slight neon cyan reflections at edges where wall meets floor.
Asset Name: dojang_wall_tex.png
- Description: 1024×1024 tile of corrugated metal with pipelines and emissive Hangul trigrams (☰, ☲, etc.) behind semi‐opaque panels.
- File Format: PNG (with separate emissive mask channel if you plan to animate neon flicker).
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - The emissive mask will let you “pulse” each trigram glyph via a simple shader or a flicker sprite.
Asset Name: dojang_wall_neon_flicker.png (optional flipbook)
- Description: A small flipbook (e.g. 4 frames at 256×256) showing a neon glyph flicker (cycle through 0%, 50%, 100% brightness).
- File Format: PNG sprite sheet
- Folder: assets/vfx/animations/
Asset Name: training_console_model.png
- Description: 512×512 stylized grayscale sprite of a holo‐console (flat sprite) with cyan emissive accents (for real‐time data display).
- File Format: PNG
- Folder: assets/visual/props/
- Notes: Use this as a static background element; you can overlay bitmaps of gauge bars, or simply let the console glow.
Asset Name: stance_pad_circle.png
- Description: 256×256 semi‐transparent PNG of a glowing floor circle. Pulses from 0 → 100% opacity in a 1s loop.
- File Format: PNG (alpha)
- Folder: assets/visual/props/

2. UI Icons & HUD Elements

2.1 Stance Icons

Each icon is a 64×64 px SVG (so it scales crisply). We’ll load them as textures in Pixi and tint/animate as needed.

icon_stance_defensive.svg
- Outline style in Slate Gray (#2E3538) when inactive.
- Filled with Teal Neon (#00FFC8) + soft glow when active.
icon_stance_balanced.svg
- Outline in Slate Gray; filled with Teal Neon on hover/active.
icon_stance_aggressive.svg
- Outline in Slate Gray; filled with Crimson (#FF0044) on “charged” or “ready” state, or Teal Neon when selected.
Folder: assets/ui/icons/stances/

2.2 Trigram Icons

File Names:

icon_trigram_1.svg
icon_trigram_2.svg
…
icon_trigram_8.svg
``$

\text{Each} \text{icon}: 48 \times 48 \text{px}, \text{dark} \text{background} (\text{Gunmetal} $#424A50`) with the trigram glyph in Teal Neon.
States:
- Inactive: no glow, just basic fill.
- Active: slight outer glow + subtle 1.1× scale “pulse.”
- Hover: 1.05× scale + quick glow (0.2 s).
Folder: assets/ui/icons/trigrams/

2.3 HUD Bars & Overlays

hud_health_bar.png (800×32 px PNG)
- 10 segmented blocks. Each filled segment is Cyan Glow (#1BE7FF); empty is Slate Gray.
- Folder: assets/ui/hud/
hud_pain_bar.png (800×16 px PNG)
- 10 segments. Filled segments are Crimson (#FF0044); empty Slate Gray.
- Folder: assets/ui/hud/
ui_button_start_idle.png & ui_button_start_hover.png (256×64 px each)
- Idle: Slate Gray panel with “▶ Start Combat” in Hangul+English.
- Hover: Underline in Teal Neon + icon (“▶”) glows.
- Folder: assets/ui/buttons/
ui_panel_slate.png (1024×512 px)
- A semi-opaque Slate Gray panel (70% opacity) with a subtle noise texture.
- Folder: assets/ui/panels/
tooltip_arrow.png (32×32 px PNG)
- Small triangle arrow in Cyan Glow for tooltips.
- Folder: assets/ui/tooltips/

3. Technique Animations (AnimatedSprite Sprite Sheets)

Any time you see code like:

await Assets.load("path/to/spritesheet.json");
const frames = [];
for (let i = 0; i < N; i++) {
  frames.push(Texture.from(`frame${i}.png`));
}
const anim = new AnimatedSprite(frames);

…you need a sprite sheet JSON + corresponding PNG atlas for each “technique.” Below is a minimal required set of technique animations:

3.1 Light Strike Animation (All Archetypes)

Sprite Sheet JSON: strike_light_spritesheet.json
Texture Atlas: strike_light_spritesheet.png (e.g., 512×512 containing all 6 frames laid out in a grid).
Frame Count: 6 frames, each ~128×256 (portrait orientation).
Animation Speed: 0.6 (adjust per archetype).
Visual Content: Character winds up → quick punch/kick → recoil. No background in atlas (transparent).
Folder: assets/characters/animations/techniques/light/

3.2 Medium Strike Animation

Sprite Sheet JSON: strike_medium_spritesheet.json
Texture Atlas: strike_medium_spritesheet.png (6–8 frames, ~128×256 each).
Description: More wind-up, more impact frames, a small dust puff frame integrated (see VFX).
Folder: assets/characters/animations/techniques/medium/

3.3 Heavy Strike Animation

Sprite Sheet JSON: strike_heavy_spritesheet.json
Texture Atlas: strike_heavy_spritesheet.png (8 frames, ~256×256 each).
Description: Big wind-up, slow-mo pause on impact, splash of embedded VFX dust/blood.
Folder: assets/characters/animations/techniques/heavy/

3.4 Critical Strike / Finisher Animation

Sprite Sheet JSON: strike_critical_spritesheet.json
Texture Atlas: strike_critical_spritesheet.png (10–12 frames, ~256×256).
Description: Slow-mo bone-breaking blow → flash frame → slowdown.
Folder: assets/characters/animations/techniques/critical/

3.5 Dodge / Evade Animation

Sprite Sheet JSON: dodge_spritesheet.json
Texture Atlas: dodge_spritesheet.png (4–6 frames, ~128×256).
Description: Quick sidestep/backflip frames, subtle afterimage.
Folder: assets/characters/animations/techniques/dodge/

3.6 Block / Parry Animation

Sprite Sheet JSON: block_spritesheet.json
Texture Atlas: block_spritesheet.png (5 frames, ~128×256).
Description: Character raises arm/weapon to block → recoil if successful.
Folder: assets/characters/animations/techniques/block/

3.7 Hit Reaction Animation

Sprite Sheet JSON: hit_reaction_spritesheet.json
Texture Atlas: hit_reaction_spritesheet.png (4 frames, ~128×256).
Description: Character flinches backwards, tinted red on final frame.
Folder: assets/characters/animations/techniques/hit/

3.8 Finisher Sequence (All Archetypes)

Sprite Sheet JSON: finisher_musa_spritesheet.json, finisher_amsalja_spritesheet.json, etc.
Texture Atlas: finisher_musa_spritesheet.png (12 frames, ~256×256), etc.
Description: A multi-stage “cinematic” finisher (pause → bone crushing → slow fade).
Folder: assets/characters/animations/finisher/

4. Pixi.js Dependencies & Modules Needed

import {
  Application,
  TickerPlugin, // core ticker
  ResizePlugin, // auto resizes to window
  Assets, // for loading JSON/PNG atlases
  Texture,
  Sprite,
  AnimatedSprite,
  Container,
  TilingSprite, // if you want parallax/tiled backgrounds
  Loader, // older API if you prefer Loader instead of Assets
} from "pixi.js";

Application (from app/Application.mjs)
- Creates the Pixi canvas, WebGL context, stage, etc.
TickerPlugin & ResizePlugin
- Ensures your app’s ticker (main game loop) and auto-resize functionality.

Assets (from assets/Assets.mjs)

The new recommended loader for JSON sprite sheets, PNGs, audio, etc.

Example:

await Assets.load(
  "assets/characters/animations/techniques/light/strike_light_spritesheet.json"
);

Texture (from rendering/texture/Texture.mjs)
- Create textures from loaded assets:
```
const frameTex = Texture.from("strike_light_000.png");
```
Sprite & AnimatedSprite (from scene/sprite/Sprite.mjs & scene/sprite-animated/AnimatedSprite.mjs)
- Sprite for static images (UI icons, backgrounds).
- AnimatedSprite for flipbook animations (techniques, VFX).
Container (from scene/container/Container.mjs)
- Use a parent Container for grouping layers:
  - backgroundContainer
  - characterContainer
  - uiContainer
  - vfxContainer
TilingSprite (from scene/sprite-tiling/TilingSprite.mjs)
- If you want to scroll/loop the intro_bg_loop.png or tile dojang_floor_tex.png seamlessly across a larger stage.
Loader (from assets/loader/Loader.mjs)
- If you prefer the older PIXI.Loader API to Assets. Both are possible; Assets is recommended for newer Pixi versions.
Filter / BlurFilter / DisplacementFilter (from filters/defaults/*)
- Useful for adding real-time blur afterimages (for dodge), screen shakes, or ripples when powering up Ki (ki_charge).

5. Directory Structure & Final Checklist

Below is a consolidated folder structure showing where each of the above assets live. This is what your repo (or build pipeline) needs before you start coding the Pixi setup:

/assets
│
├─ characters/
│  ├─ animations/
│  │   ├─ techniques/
│  │   │   ├─ light/
│  │   │   │   ├─ strike_light_spritesheet.json
│  │   │   │   └─ strike_light_spritesheet.png
│  │   │   ├─ medium/
│  │   │   │   ├─ strike_medium_spritesheet.json
│  │   │   │   └─ strike_medium_spritesheet.png
│  │   │   ├─ heavy/
│  │   │   │   ├─ strike_heavy_spritesheet.json
│  │   │   │   └─ strike_heavy_spritesheet.png
│  │   │   ├─ critical/
│  │   │   │   ├─ strike_critical_spritesheet.json
│  │   │   │   └─ strike_critical_spritesheet.png
│  │   │   ├─ dodge/
│  │   │   │   ├─ dodge_spritesheet.json
│  │   │   │   └─ dodge_spritesheet.png
│  │   │   ├─ block/
│  │   │   │   ├─ block_spritesheet.json
│  │   │   │   └─ block_spritesheet.png
│  │   │   └─ hit/
│  │   │       ├─ hit_reaction_spritesheet.json
│  │   │       └─ hit_reaction_spritesheet.png
│  │   └─ finisher/
│  │       ├─ musa_finisher_spritesheet.json
│  │       └─ musa_finisher_spritesheet.png
│  │       ├─ amsalja_finisher_spritesheet.json
│  │       └─ amsalja_finisher_spritesheet.png
│  │       └─ … (one per archetype)
│  └─ portraits/
│      ├─ portrait_musa.png
│      ├─ portrait_amsalja.png
│      └─ … (other archetypes)
│
├─ fonts/
│  ├─ BlackTrigram-Hangul.woff2
│  ├─ NotoSansKR-Regular.woff2
│  └─ Roboto-Regular.woff2
│
├─ i18n/
│  ├─ ko.json
│  └─ en.json
│
├─ props/
│  ├─ training_console_model.png
│  ├─ stance_pad_circle.png
│  └─ dummy_target_overlay.svg
│
├─ shaders/
│  ├─ rim_light.shader
│  ├─ blood_decal.shader
│  └─ neon_flicker.shader
│
├─ ui/
│  ├─ buttons/
│  │   ├─ ui_button_start_idle.png
│  │   └─ ui_button_start_hover.png
│  ├─ icons/
│  │   ├─ stances/
│  │   │   ├─ icon_stance_defensive.svg
│  │   │   ├─ icon_stance_balanced.svg
│  │   │   └─ icon_stance_aggressive.svg
│  │   ├─ trigrams/
│  │   │   ├─ icon_trigram_1.svg
│  │   │   ├─ icon_trigram_2.svg
│  │   │   └─ … up to icon_trigram_8.svg
│  │   └─ tooltip_arrow.png
│  └─ hud/
│      ├─ hud_health_bar.png
│      └─ hud_pain_bar.png
│
├─ vfx/
│  ├─ animations/
│  │   ├─ anim_logo_pulse.json
│  │   ├─ anim_menu_slide_0.png … anim_menu_slide_7.png
│  │   ├─ anim_strike_impact_0.png … anim_strike_impact_15.png
│  │   └─ anim_finisher_musa_0.png … anim_finisher_musa_11.png
│  ├─ particles/
│  │   ├─ vfx_dust_puff.png
│  │   ├─ vfx_blood_splatter.png
│  │   └─ confetti_sprites.png
│  └─ shaders/
│      ├─ vfx_impact_ring.png
│      ├─ vfx_neon_glow.png
│      └─ vfx_critical_flash.png
│
├─ visual/
│  ├─ bg/
│  │   ├─ intro/
│  │   │   ├─ intro_bg_loop.png
│  │   │   └─ mainmenu_foreground_overlay.png
│  │   └─ dojang/
│  │       ├─ dojang_floor_tex.png
│  │       └─ dojang_wall_tex.png
│  └─ overlays/
│      ├─ vital_region_head.png
│      ├─ vital_region_neck.png
│      ├─ vital_region_torso.png
│      ├─ vital_region_arms.png
│      ├─ vital_region_chest.png
│      └─ vital_region_legs.png
│
└─ public/
   └─ assets/
       └─ audio/
           ├─ music/
           │   ├─ intro_theme.webm
           │   ├─ combat_theme.webm
           │   ├─ combat_theme_geon.webm
           │   ├─ training_theme.webm
           │   ├─ meditation_theme.webm
           │   ├─ victory_theme.webm
           │   ├─ underground_rave_theme.webm
           │   └─ ambient_loop.webm
           └─ sfx/
               ├─ ambient/
               │   ├─ dojang_ambience.webm
               │   ├─ wind_effect.webm
               │   └─ dojo_crowd.webm
               ├─ attacks/
               │   ├─ attack_punch_light.webm
               │   ├─ attack_punch_medium.webm
               │   ├─ attack_kick_heavy.webm
               │   ├─ attack_light.webm
               │   ├─ attack_medium.webm
               │   ├─ attack_critical.webm
               │   ├─ attack_special_geon.webm
               │   ├─ dodge.webm
               │   ├─ block_success.webm
               │   ├─ block_break.webm
               │   └─ perfect_strike.webm
               ├─ hit/
               │   ├─ hit_light.webm
               │   ├─ hit_medium.webm
               │   ├─ hit_heavy.webm
               │   ├─ hit_critical.webm
               │   ├─ hit_flesh.webm
               │   └─ hit_block.webm
               ├─ combo/
               │   ├─ combo_buildup.webm
               │   ├─ combo_finish.webm
               │   └─ energy_pulse.webm
               ├─ match/
               │   ├─ match_start.webm
               │   ├─ countdown.webm
               │   ├─ match_end.webm
               │   ├─ victory.webm
               │   └─ defeat.webm
               ├─ movement/
               │   ├─ footstep.webm
               │   └─ stance_change.webm
               ├─ ki/
               │   ├─ ki_charge.webm
               │   └─ ki_release.webm
               ├─ stamina/
               │   └─ stamina_depleted.webm
               ├─ health/
               │   └─ health_low.webm
               └─ ui/
                   ├─ menu_click.webm
                   ├─ menu_navigate.webm
                   ├─ menu_select.webm
                   ├─ menu_hover.webm
                   └─ menu_back.webm

1. Backgrounds & Environments

Asset Name: intro_bg_loop.png
- Description: A seamless 1920×1080 loopable tile of a rain‐slicked concrete floor with neon pipes and drifting data‐line grid.
- File Format: PNG (plus normal/roughness if you want subtle 3D lighting on flat sprites, but PNG is usually enough).
- Folder: assets/visual/bg/intro/
- Visual Style Notes:
  - Base color: Obsidian (#0A0F12) with subtle film‐grain overlay.
  - Neon accents: teal/cyan reflections on puddles, flickering Hangul glyphs on pipes.
  - Animation: small “rain drip” loop in shader or flipbook.
Asset Name: mainmenu_foreground_overlay.png
- Description: A semi‐transparent obsidian vignette (20px “soft edge”) to darken screen edges, helping text/logo pop.
- File Format: PNG (alpha)
- Folder: assets/visual/overlays/
- Usage: Placed above intro_bg_loop to darken corners.

1.2 Dojang / Training Hall Background

Asset Name: dojang_floor_tex.png
- Description: 2048×2048 PBR‐style image of matte‐black tatami mats, with subtle water puddle normals (if you want dynamic reflections).
- File Format: PNG (or PNG + normal/roughness if desired)
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - Tileable so it can fill any resolution.
  - Slight neon cyan reflections at edges where wall meets floor.
Asset Name: dojang_wall_tex.png
- Description: 1024×1024 tile of corrugated metal with pipelines and emissive Hangul trigrams (☰, ☲, etc.) behind semi‐opaque panels.
- File Format: PNG (with separate emissive mask channel if you plan to animate neon flicker).
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - The emissive mask will let you “pulse” each trigram glyph via a simple shader or a flicker sprite.
Asset Name: dojang_wall_neon_flicker.png (optional flipbook)
- Description: A small flipbook (e.g. 4 frames at 256×256) showing a neon glyph flicker (cycle through 0%, 50%, 100% brightness).
- File Format: PNG sprite sheet
- Folder: assets/vfx/animations/
Asset Name: training_console_model.png
- Description: 512×512 stylized grayscale sprite of a holo‐console (flat sprite) with cyan emissive accents (for real‐time data display).
- File Format: PNG
- Folder: assets/visual/props/
- Notes: Use this as a static background element; you can overlay bitmaps of gauge bars, or simply let the console glow.
Asset Name: stance_pad_circle.png
- Description: 256×256 semi‐transparent PNG of a glowing floor circle. Pulses from 0 → 100% opacity in a 1s loop.
- File Format: PNG (alpha)
- Folder: assets/visual/props/

2. UI Icons & HUD Elements

2.1 Stance Icons

Each icon is a 64×64 px SVG (so it scales crisply). We’ll load them as textures in Pixi and tint/animate as needed.

icon_stance_defensive.svg
- Outline style in Slate Gray (#2E3538) when inactive.
- Filled with Teal Neon (#00FFC8) + soft glow when active.
icon_stance_balanced.svg
- Outline in Slate Gray; filled with Teal Neon on hover/active.
icon_stance_aggressive.svg
- Outline in Slate Gray; filled with Crimson (#FF0044) on “charged” or “ready” state, or Teal Neon when selected.
Folder: assets/ui/icons/stances/

2.2 Trigram Icons

File Names:

icon_trigram_1.svg
icon_trigram_2.svg
…
icon_trigram_8.svg
``$

\text{Each} \text{icon}: 48 \times 48 \text{px}, \text{dark} \text{background} (\text{Gunmetal} $#424A50`) with the trigram glyph in Teal Neon.
States:
- Inactive: no glow, just basic fill.
- Active: slight outer glow + subtle 1.1× scale “pulse.”
- Hover: 1.05× scale + quick glow (0.2 s).
Folder: assets/ui/icons/trigrams/

2.3 HUD Bars & Overlays

hud_health_bar.png (800×32 px PNG)
- 10 segmented blocks. Each filled segment is Cyan Glow (#1BE7FF); empty is Slate Gray.
- Folder: assets/ui/hud/
hud_pain_bar.png (800×16 px PNG)
- 10 segments. Filled segments are Crimson (#FF0044); empty Slate Gray.
- Folder: assets/ui/hud/
ui_button_start_idle.png & ui_button_start_hover.png (256×64 px each)
- Idle: Slate Gray panel with “▶ Start Combat” in Hangul+English.
- Hover: Underline in Teal Neon + icon (“▶”) glows.
- Folder: assets/ui/buttons/
ui_panel_slate.png (1024×512 px)
- A semi-opaque Slate Gray panel (70% opacity) with a subtle noise texture.
- Folder: assets/ui/panels/
tooltip_arrow.png (32×32 px PNG)
- Small triangle arrow in Cyan Glow for tooltips.
- Folder: assets/ui/tooltips/

3. Technique Animations (AnimatedSprite Sprite Sheets)

Any time you see code like:

await Assets.load("path/to/spritesheet.json");
const frames = [];
for (let i = 0; i < N; i++) {
  frames.push(Texture.from(`frame${i}.png`));
}
const anim = new AnimatedSprite(frames);

…you need a sprite sheet JSON + corresponding PNG atlas for each “technique.” Below is a minimal required set of technique animations:

3.1 Light Strike Animation (All Archetypes)

Sprite Sheet JSON: strike_light_spritesheet.json
Texture Atlas: strike_light_spritesheet.png (e.g., 512×512 containing all 6 frames laid out in a grid).
Frame Count: 6 frames, each ~128×256 (portrait orientation).
Animation Speed: 0.6 (adjust per archetype).
Visual Content: Character winds up → quick punch/kick → recoil. No background in atlas (transparent).
Folder: assets/characters/animations/techniques/light/

3.2 Medium Strike Animation

Sprite Sheet JSON: strike_medium_spritesheet.json
Texture Atlas: strike_medium_spritesheet.png (6–8 frames, ~128×256 each).
Description: More wind-up, more impact frames, a small dust puff frame integrated (see VFX).
Folder: assets/characters/animations/techniques/medium/

3.3 Heavy Strike Animation

Sprite Sheet JSON: strike_heavy_spritesheet.json
Texture Atlas: strike_heavy_spritesheet.png (8 frames, ~256×256 each).
Description: Big wind-up, slow-mo pause on impact, splash of embedded VFX dust/blood.
Folder: assets/characters/animations/techniques/heavy/

3.4 Critical Strike / Finisher Animation

Sprite Sheet JSON: strike_critical_spritesheet.json
Texture Atlas: strike_critical_spritesheet.png (10–12 frames, ~256×256).
Description: Slow-mo bone-breaking blow → flash frame → slowdown.
Folder: assets/characters/animations/techniques/critical/

3.5 Dodge / Evade Animation

Sprite Sheet JSON: dodge_spritesheet.json
Texture Atlas: dodge_spritesheet.png (4–6 frames, ~128×256).
Description: Quick sidestep/backflip frames, subtle afterimage.
Folder: assets/characters/animations/techniques/dodge/

3.6 Block / Parry Animation

Sprite Sheet JSON: block_spritesheet.json
Texture Atlas: block_spritesheet.png (5 frames, ~128×256).
Description: Character raises arm/weapon to block → recoil if successful.
Folder: assets/characters/animations/techniques/block/

3.7 Hit Reaction Animation

Sprite Sheet JSON: hit_reaction_spritesheet.json
Texture Atlas: hit_reaction_spritesheet.png (4 frames, ~128×256).
Description: Character flinches backwards, tinted red on final frame.
Folder: assets/characters/animations/techniques/hit/

3.8 Finisher Sequence (All Archetypes)

Sprite Sheet JSON: finisher_musa_spritesheet.json, finisher_amsalja_spritesheet.json, etc.
Texture Atlas: finisher_musa_spritesheet.png (12 frames, ~256×256), etc.
Description: A multi-stage “cinematic” finisher (pause → bone crushing → slow fade).
Folder: assets/characters/animations/finisher/

4. Pixi.js Dependencies & Modules Needed

import {
  Application,
  TickerPlugin, // core ticker
  ResizePlugin, // auto resizes to window
  Assets, // for loading JSON/PNG atlases
  Texture,
  Sprite,
  AnimatedSprite,
  Container,
  TilingSprite, // if you want parallax/tiled backgrounds
  Loader, // older API if you prefer Loader instead of Assets
} from "pixi.js";

Application (from app/Application.mjs)
- Creates the Pixi canvas, WebGL context, stage, etc.
TickerPlugin & ResizePlugin
- Ensures your app’s ticker (main game loop) and auto-resize functionality.

Assets (from assets/Assets.mjs)

The new recommended loader for JSON sprite sheets, PNGs, audio, etc.

Example:

await Assets.load(
  "assets/characters/animations/techniques/light/strike_light_spritesheet.json"
);

Texture (from rendering/texture/Texture.mjs)
- Create textures from loaded assets:
```
const frameTex = Texture.from("strike_light_000.png");
```
Sprite & AnimatedSprite (from scene/sprite/Sprite.mjs & scene/sprite-animated/AnimatedSprite.mjs)
- Sprite for static images (UI icons, backgrounds).
- AnimatedSprite for flipbook animations (techniques, VFX).
Container (from scene/container/Container.mjs)
- Use a parent Container for grouping layers:
  - backgroundContainer
  - characterContainer
  - uiContainer
  - vfxContainer
TilingSprite (from scene/sprite-tiling/TilingSprite.mjs)
- If you want to scroll/loop the intro_bg_loop.png or tile dojang_floor_tex.png seamlessly across a larger stage.
Loader (from assets/loader/Loader.mjs)
- If you prefer the older PIXI.Loader API to Assets. Both are possible; Assets is recommended for newer Pixi versions.
Filter / BlurFilter / DisplacementFilter (from filters/defaults/*)
- Useful for adding real-time blur afterimages (for dodge), screen shakes, or ripples when powering up Ki (ki_charge).

5. Directory Structure & Final Checklist

Below is a consolidated folder structure showing where each of the above assets live. This is what your repo (or build pipeline) needs before you start coding the Pixi setup:

/assets
│
├─ characters/
│  ├─ animations/
│  │   ├─ techniques/
│  │   │   ├─ light/
│  │   │   │   ├─ strike_light_spritesheet.json
│  │   │   │   └─ strike_light_spritesheet.png
│  │   │   ├─ medium/
│  │   │   │   ├─ strike_medium_spritesheet.json
│  │   │   │   └─ strike_medium_spritesheet.png
│  │   │   ├─ heavy/
│  │   │   │   ├─ strike_heavy_spritesheet.json
│  │   │   │   └─ strike_heavy_spritesheet.png
│  │   │   ├─ critical/
│  │   │   │   ├─ strike_critical_spritesheet.json
│  │   │   │   └─ strike_critical_spritesheet.png
│  │   │   ├─ dodge/
│  │   │   │   ├─ dodge_spritesheet.json
│  │   │   │   └─ dodge_spritesheet.png
│  │   │   ├─ block/
│  │   │   │   ├─ block_spritesheet.json
│  │   │   │   └─ block_spritesheet.png
│  │   │   └─ hit/
│  │   │       ├─ hit_reaction_spritesheet.json
│  │   │       └─ hit_reaction_spritesheet.png
│  │   └─ finisher/
│  │       ├─ musa_finisher_spritesheet.json
│  │       └─ musa_finisher_spritesheet.png
│  │       ├─ amsalja_finisher_spritesheet.json
│  │       └─ amsalja_finisher_spritesheet.png
│  │       └─ … (one per archetype)
│  └─ portraits/
│      ├─ portrait_musa.png
│      ├─ portrait_amsalja.png
│      └─ … (other archetypes)
│
├─ fonts/
│  ├─ BlackTrigram-Hangul.woff2
│  ├─ NotoSansKR-Regular.woff2
│  └─ Roboto-Regular.woff2
│
├─ i18n/
│  ├─ ko.json
│  └─ en.json
│
├─ props/
│  ├─ training_console_model.png
│  ├─ stance_pad_circle.png
│  └─ dummy_target_overlay.svg
│
├─ shaders/
│  ├─ rim_light.shader
│  ├─ blood_decal.shader
│  └─ neon_flicker.shader
│
├─ ui/
│  ├─ buttons/
│  │   ├─ ui_button_start_idle.png
│  │   └─ ui_button_start_hover.png
│  ├─ icons/
│  │   ├─ stances/
│  │   │   ├─ icon_stance_defensive.svg
│  │   │   ├─ icon_stance_balanced.svg
│  │   │   └─ icon_stance_aggressive.svg
│  │   ├─ trigrams/
│  │   │   ├─ icon_trigram_1.svg
│  │   │   ├─ icon_trigram_2.svg
│  │   │   └─ … up to icon_trigram_8.svg
│  │   └─ tooltip_arrow.png
│  └─ hud/
│      ├─ hud_health_bar.png
│      └─ hud_pain_bar.png
│
├─ vfx/
│  ├─ animations/
│  │   ├─ anim_logo_pulse.json
│  │   ├─ anim_menu_slide_0.png … anim_menu_slide_7.png
│  │   ├─ anim_strike_impact_0.png … anim_strike_impact_15.png
│  │   └─ anim_finisher_musa_0.png … anim_finisher_musa_11.png
│  ├─ particles/
│  │   ├─ vfx_dust_puff.png
│  │   ├─ vfx_blood_splatter.png
│  │   └─ confetti_sprites.png
│  └─ shaders/
│      ├─ vfx_impact_ring.png
│      ├─ vfx_neon_glow.png
│      └─ vfx_critical_flash.png
│
├─ visual/
│  ├─ bg/
│  │   ├─ intro/
│  │   │   ├─ intro_bg_loop.png
│  │   │   └─ mainmenu_foreground_overlay.png
│  │   └─ dojang/
│  │       ├─ dojang_floor_tex.png
│  │       └─ dojang_wall_tex.png
│  └─ overlays/
│      ├─ vital_region_head.png
│      ├─ vital_region_neck.png
│      ├─ vital_region_torso.png
│      ├─ vital_region_arms.png
│      ├─ vital_region_chest.png
│      └─ vital_region_legs.png
│
└─ public/
   └─ assets/
       └─ audio/
           ├─ music/
           │   ├─ intro_theme.webm
           │   ├─ combat_theme.webm
           │   ├─ combat_theme_geon.webm
           │   ├─ training_theme.webm
           │   ├─ meditation_theme.webm
           │   ├─ victory_theme.webm
           │   ├─ underground_rave_theme.webm
           │   └─ ambient_loop.webm
           └─ sfx/
               ├─ ambient/
               │   ├─ dojang_ambience.webm
               │   ├─ wind_effect.webm
               │   └─ dojo_crowd.webm
               ├─ attacks/
               │   ├─ attack_punch_light.webm
               │   ├─ attack_punch_medium.webm
               │   ├─ attack_kick_heavy.webm
               │   ├─ attack_light.webm
               │   ├─ attack_medium.webm
               │   ├─ attack_critical.webm
               │   ├─ attack_special_geon.webm
               │   ├─ dodge.webm
               │   ├─ block_success.webm
               │   ├─ block_break.webm
               │   └─ perfect_strike.webm
               ├─ hit/
               │   ├─ hit_light.webm
               │   ├─ hit_medium.webm
               │   ├─ hit_heavy.webm
               │   ├─ hit_critical.webm
               │   ├─ hit_flesh.webm
               │   └─ hit_block.webm
               ├─ combo/
               │   ├─ combo_buildup.webm
               │   ├─ combo_finish.webm
               │   └─ energy_pulse.webm
               ├─ match/
               │   ├─ match_start.webm
               │   ├─ countdown.webm
               │   ├─ match_end.webm
               │   ├─ victory.webm
               │   └─ defeat.webm
               ├─ movement/
               │   ├─ footstep.webm
               │   └─ stance_change.webm
               ├─ ki/
               │   ├─ ki_charge.webm
               │   └─ ki_release.webm
               ├─ stamina/
               │   └─ stamina_depleted.webm
               ├─ health/
               │   └─ health_low.webm
               └─ ui/
                   ├─ menu_click.webm
                   ├─ menu_navigate.webm
                   ├─ menu_select.webm
                   ├─ menu_hover.webm
                   └─ menu_back.webm

1. Backgrounds & Environments

Asset Name: intro_bg_loop.png
- Description: A seamless 1920×1080 loopable tile of a rain‐slicked concrete floor with neon pipes and drifting data‐line grid.
- File Format: PNG (plus normal/roughness if you want subtle 3D lighting on flat sprites, but PNG is usually enough).
- Folder: assets/visual/bg/intro/
- Visual Style Notes:
  - Base color: Obsidian (#0A0F12) with subtle film‐grain overlay.
  - Neon accents: teal/cyan reflections on puddles, flickering Hangul glyphs on pipes.
  - Animation: small “rain drip” loop in shader or flipbook.
Asset Name: mainmenu_foreground_overlay.png
- Description: A semi‐transparent obsidian vignette (20px “soft edge”) to darken screen edges, helping text/logo pop.
- File Format: PNG (alpha)
- Folder: assets/visual/overlays/
- Usage: Placed above intro_bg_loop to darken corners.

1.2 Dojang / Training Hall Background

Asset Name: dojang_floor_tex.png
- Description: 2048×2048 PBR‐style image of matte‐black tatami mats, with subtle water puddle normals (if you want dynamic reflections).
- File Format: PNG (or PNG + normal/roughness if desired)
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - Tileable so it can fill any resolution.
  - Slight neon cyan reflections at edges where wall meets floor.
Asset Name: dojang_wall_tex.png
- Description: 1024×1024 tile of corrugated metal with pipelines and emissive Hangul trigrams (☰, ☲, etc.) behind semi‐opaque panels.
- File Format: PNG (with separate emissive mask channel if you plan to animate neon flicker).
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - The emissive mask will let you “pulse” each trigram glyph via a simple shader or a flicker sprite.
Asset Name: dojang_wall_neon_flicker.png (optional flipbook)
- Description: A small flipbook (e.g. 4 frames at 256×256) showing a neon glyph flicker (cycle through 0%, 50%, 100% brightness).
- File Format: PNG sprite sheet
- Folder: assets/vfx/animations/
Asset Name: training_console_model.png
- Description: 512×512 stylized grayscale sprite of a holo‐console (flat sprite) with cyan emissive accents (for real‐time data display).
- File Format: PNG
- Folder: assets/visual/props/
- Notes: Use this as a static background element; you can overlay bitmaps of gauge bars, or simply let the console glow.
Asset Name: stance_pad_circle.png
- Description: 256×256 semi‐transparent PNG of a glowing floor circle. Pulses from 0 → 100% opacity in a 1s loop.
- File Format: PNG (alpha)
- Folder: assets/visual/props/

2. UI Icons & HUD Elements

2.1 Stance Icons

Each icon is a 64×64 px SVG (so it scales crisply). We’ll load them as textures in Pixi and tint/animate as needed.

icon_stance_defensive.svg
- Outline style in Slate Gray (#2E3538) when inactive.
- Filled with Teal Neon (#00FFC8) + soft glow when active.
icon_stance_balanced.svg
- Outline in Slate Gray; filled with Teal Neon on hover/active.
icon_stance_aggressive.svg
- Outline in Slate Gray; filled with Crimson (#FF0044) on “charged” or “ready” state, or Teal Neon when selected.
Folder: assets/ui/icons/stances/

2.2 Trigram Icons

File Names:

icon_trigram_1.svg
icon_trigram_2.svg
…
icon_trigram_8.svg
``$

\text{Each} \text{icon}: 48 \times 48 \text{px}, \text{dark} \text{background} (\text{Gunmetal} $#424A50`) with the trigram glyph in Teal Neon.
States:
- Inactive: no glow, just basic fill.
- Active: slight outer glow + subtle 1.1× scale “pulse.”
- Hover: 1.05× scale + quick glow (0.2 s).
Folder: assets/ui/icons/trigrams/

2.3 HUD Bars & Overlays

hud_health_bar.png (800×32 px PNG)
- 10 segmented blocks. Each filled segment is Cyan Glow (#1BE7FF); empty is Slate Gray.
- Folder: assets/ui/hud/
hud_pain_bar.png (800×16 px PNG)
- 10 segments. Filled segments are Crimson (#FF0044); empty Slate Gray.
- Folder: assets/ui/hud/
ui_button_start_idle.png & ui_button_start_hover.png (256×64 px each)
- Idle: Slate Gray panel with “▶ Start Combat” in Hangul+English.
- Hover: Underline in Teal Neon + icon (“▶”) glows.
- Folder: assets/ui/buttons/
ui_panel_slate.png (1024×512 px)
- A semi-opaque Slate Gray panel (70% opacity) with a subtle noise texture.
- Folder: assets/ui/panels/
tooltip_arrow.png (32×32 px PNG)
- Small triangle arrow in Cyan Glow for tooltips.
- Folder: assets/ui/tooltips/

3. Technique Animations (AnimatedSprite Sprite Sheets)

Any time you see code like:

await Assets.load("path/to/spritesheet.json");
const frames = [];
for (let i = 0; i < N; i++) {
  frames.push(Texture.from(`frame${i}.png`));
}
const anim = new AnimatedSprite(frames);

…you need a sprite sheet JSON + corresponding PNG atlas for each “technique.” Below is a minimal required set of technique animations:

3.1 Light Strike Animation (All Archetypes)

Sprite Sheet JSON: strike_light_spritesheet.json
Texture Atlas: strike_light_spritesheet.png (e.g., 512×512 containing all 6 frames laid out in a grid).
Frame Count: 6 frames, each ~128×256 (portrait orientation).
Animation Speed: 0.6 (adjust per archetype).
Visual Content: Character winds up → quick punch/kick → recoil. No background in atlas (transparent).
Folder: assets/characters/animations/techniques/light/

3.2 Medium Strike Animation

Sprite Sheet JSON: strike_medium_spritesheet.json
Texture Atlas: strike_medium_spritesheet.png (6–8 frames, ~128×256 each).
Description: More wind-up, more impact frames, a small dust puff frame integrated (see VFX).
Folder: assets/characters/animations/techniques/medium/

3.3 Heavy Strike Animation

Sprite Sheet JSON: strike_heavy_spritesheet.json
Texture Atlas: strike_heavy_spritesheet.png (8 frames, ~256×256 each).
Description: Big wind-up, slow-mo pause on impact, splash of embedded VFX dust/blood.
Folder: assets/characters/animations/techniques/heavy/

3.4 Critical Strike / Finisher Animation

Sprite Sheet JSON: strike_critical_spritesheet.json
Texture Atlas: strike_critical_spritesheet.png (10–12 frames, ~256×256).
Description: Slow-mo bone-breaking blow → flash frame → slowdown.
Folder: assets/characters/animations/techniques/critical/

3.5 Dodge / Evade Animation

Sprite Sheet JSON: dodge_spritesheet.json
Texture Atlas: dodge_spritesheet.png (4–6 frames, ~128×256).
Description: Quick sidestep/backflip frames, subtle afterimage.
Folder: assets/characters/animations/techniques/dodge/

3.6 Block / Parry Animation

Sprite Sheet JSON: block_spritesheet.json
Texture Atlas: block_spritesheet.png (5 frames, ~128×256).
Description: Character raises arm/weapon to block → recoil if successful.
Folder: assets/characters/animations/techniques/block/

3.7 Hit Reaction Animation

Sprite Sheet JSON: hit_reaction_spritesheet.json
Texture Atlas: hit_reaction_spritesheet.png (4 frames, ~128×256).
Description: Character flinches backwards, tinted red on final frame.
Folder: assets/characters/animations/techniques/hit/

3.8 Finisher Sequence (All Archetypes)

Sprite Sheet JSON: finisher_musa_spritesheet.json, finisher_amsalja_spritesheet.json, etc.
Texture Atlas: finisher_musa_spritesheet.png (12 frames, ~256×256), etc.
Description: A multi-stage “cinematic” finisher (pause → bone crushing → slow fade).
Folder: assets/characters/animations/finisher/

4. Pixi.js Dependencies & Modules Needed

import {
  Application,
  TickerPlugin, // core ticker
  ResizePlugin, // auto resizes to window
  Assets, // for loading JSON/PNG atlases
  Texture,
  Sprite,
  AnimatedSprite,
  Container,
  TilingSprite, // if you want parallax/tiled backgrounds
  Loader, // older API if you prefer Loader instead of Assets
} from "pixi.js";

Application (from app/Application.mjs)
- Creates the Pixi canvas, WebGL context, stage, etc.
TickerPlugin & ResizePlugin
- Ensures your app’s ticker (main game loop) and auto-resize functionality.

Assets (from assets/Assets.mjs)

The new recommended loader for JSON sprite sheets, PNGs, audio, etc.

Example:

await Assets.load(
  "assets/characters/animations/techniques/light/strike_light_spritesheet.json"
);

Texture (from rendering/texture/Texture.mjs)
- Create textures from loaded assets:
```
const frameTex = Texture.from("strike_light_000.png");
```
Sprite & AnimatedSprite (from scene/sprite/Sprite.mjs & scene/sprite-animated/AnimatedSprite.mjs)
- Sprite for static images (UI icons, backgrounds).
- AnimatedSprite for flipbook animations (techniques, VFX).
Container (from scene/container/Container.mjs)
- Use a parent Container for grouping layers:
  - backgroundContainer
  - characterContainer
  - uiContainer
  - vfxContainer
TilingSprite (from scene/sprite-tiling/TilingSprite.mjs)
- If you want to scroll/loop the intro_bg_loop.png or tile dojang_floor_tex.png seamlessly across a larger stage.
Loader (from assets/loader/Loader.mjs)
- If you prefer the older PIXI.Loader API to Assets. Both are possible; Assets is recommended for newer Pixi versions.
Filter / BlurFilter / DisplacementFilter (from filters/defaults/*)
- Useful for adding real-time blur afterimages (for dodge), screen shakes, or ripples when powering up Ki (ki_charge).

5. Directory Structure & Final Checklist

Below is a consolidated folder structure showing where each of the above assets live. This is what your repo (or build pipeline) needs before you start coding the Pixi setup:

/assets
├─ characters/
│  ├─ animations/
│  │   ├─ techniques/
│  │   │   ├─ light/
│  │   │   │   ├─ strike_light_spritesheet.json
│  │   │   │   └─ strike_light_spritesheet.png
│  │   │   ├─ medium/
│  │   │   │   ├─ strike_medium_spritesheet.json
│  │   │   │   └─ strike_medium_spritesheet.png
│  │   │   ├─ heavy/
│  │   │   │   ├─ strike_heavy_spritesheet.json
│  │   │   │   └─ strike_heavy_spritesheet.png
│  │   │   ├─ critical/
│  │   │   │   ├─ strike_critical_spritesheet.json
│  │   │   │   └─ strike_critical_spritesheet.png
│  │   │   ├─ dodge/
│  │   │   │   ├─ dodge_spritesheet.json
│  │   │   │   └─ dodge_spritesheet.png
│  │   │   ├─ block/
│  │   │   │   ├─ block_spritesheet.json
│  │   │   │   └─ block_spritesheet.png
│  │   │   └─ hit/
│  │   │       ├─ hit_reaction_spritesheet.json
│  │   │       └─ hit_reaction_spritesheet.png
│  │   └─ finisher/
│  │       ├─ musa_finisher_spritesheet.json
│  │       └─ musa_finisher_spritesheet.png
│  │       ├─ amsalja_finisher_spritesheet.json
│  │       └─ amsalja_finisher_spritesheet.png
│  │       └─ … (one per archetype)
│  └─ portraits/
│      ├─ portrait_musa.png
│      ├─ portrait_amsalja.png
│      └─ … (other archetypes)
│
├─ fonts/
│  ├─ BlackTrigram-Hangul.woff2
│  ├─ NotoSansKR-Regular.woff2
│  └─ Roboto-Regular.woff2
│
├─ i18n/
│  ├─ ko.json
│  └─ en.json
│
├─ props/
│  ├─ training_console_model.png
│  ├─ stance_pad_circle.png
│  └─ dummy_target_overlay.svg
│
├─ shaders/
│  ├─ rim_light.shader
│  ├─ blood_decal.shader
│  └─ neon_flicker.shader
│
├─ ui/
│  ├─ buttons/
│  │   ├─ ui_button_start_idle.png
│  │   └─ ui_button_start_hover.png
│  ├─ icons/
│  │   ├─ stances/
│  │   │   ├─ icon_stance_defensive.svg
│  │   │   ├─ icon_stance_balanced.svg
│  │   │   └─ icon_stance_aggressive.svg
│  │   ├─ trigrams/
│  │   │   ├─ icon_trigram_1.svg
│  │   │   ├─ icon_trigram_2.svg
│  │   │   └─ … up to icon_trigram_8.svg
│  │   └─ tooltip_arrow.png
│  └─ hud/
│      ├─ hud_health_bar.png
│      └─ hud_pain_bar.png
│
├─ vfx/
│  ├─ animations/
│  │   ├─ anim_logo_pulse.json
│  │   ├─ anim_menu_slide_0.png … anim_menu_slide_7.png
│  │   ├─ anim_strike_impact_0.png … anim_strike_impact_15.png
│  │   └─ anim_finisher_musa_0.png … anim_finisher_musa_11.png
│  ├─ particles/
│  │   ├─ vfx_dust_puff.png
│  │   ├─ vfx_blood_splatter.png
│  │   └─ confetti_sprites.png
│  └─ shaders/
│      ├─ vfx_impact_ring.png
│      ├─ vfx_neon_glow.png
│      └─ vfx_critical_flash.png
│
├─ visual/
│  ├─ bg/
│  │   ├─ intro/
│  │   │   ├─ intro_bg_loop.png
│  │   │   └─ mainmenu_foreground_overlay.png
│  │   └─ dojang/
│  │       ├─ dojang_floor_tex.png
│  │       └─ dojang_wall_tex.png
│  └─ overlays/
│      ├─ vital_region_head.png
│      ├─ vital_region_neck.png
│      ├─ vital_region_torso.png
│      ├─ vital_region_arms.png
│      ├─ vital_region_chest.png
│      └─ vital_region_legs.png
│
└─ public/
   └─ assets/
       └─ audio/
           ├─ music/
           │   ├─ intro_theme.webm
           │   ├─ combat_theme.webm
           │   ├─ combat_theme_geon.webm
           │   ├─ training_theme.webm
           │   ├─ meditation_theme.webm
           │   ├─ victory_theme.webm
           │   ├─ underground_rave_theme.webm
           │   └─ ambient_loop.webm
           └─ sfx/
               ├─ ambient/
               │   ├─ dojang_ambience.webm
               │   ├─ wind_effect.webm
               │   └─ dojo_crowd.webm
               ├─ attacks/
               │   ├─ attack_punch_light.webm
               │   ├─ attack_punch_medium.webm
               │   ├─ attack_kick_heavy.webm
               │   ├─ attack_light.webm
               │   ├─ attack_medium.webm
               │   ├─ attack_critical.webm
               │   ├─ attack_special_geon.webm
               │   ├─ dodge.webm
               │   ├─ block_success.webm
               │   ├─ block_break.webm
               │   └─ perfect_strike.webm
               ├─ hit/
               │   ├─ hit_light.webm
               │   ├─ hit_medium.webm
               │   ├─ hit_heavy.webm
               │   ├─ hit_critical.webm
               │   ├─ hit_flesh.webm
               │   └─ hit_block.webm
               ├─ combo/
               │   ├─ combo_buildup.webm
               │   ├─ combo_finish.webm
               │   └─ energy_pulse.webm
               ├─ match/
               │   ├─ match_start.webm
               │   ├─ countdown.webm
               │   ├─ match_end.webm
               │   ├─ victory.webm
               │   └─ defeat.webm
               ├─ movement/
               │   ├─ footstep.webm
               │   └─ stance_change.webm
               ├─ ki/
               │   ├─ ki_charge.webm
               │   └─ ki_release.webm
               ├─ stamina/
               │   └─ stamina_depleted.webm
               ├─ health/
               │   └─ health_low.webm
               └─ ui/
                   ├─ menu_click.webm
                   ├─ menu_navigate.webm
                   ├─ menu_select.webm
                   ├─ menu_hover.webm
                   └─ menu_back.webm

1. Backgrounds & Environments

Asset Name: intro_bg_loop.png
- Description: A seamless 1920×1080 loopable tile of a rain‐slicked concrete floor with neon pipes and drifting data‐line grid.
- File Format: PNG (plus normal/roughness if you want subtle 3D lighting on flat sprites, but PNG is usually enough).
- Folder: assets/visual/bg/intro/
- Visual Style Notes:
  - Base color: Obsidian (#0A0F12) with subtle film‐grain overlay.
  - Neon accents: teal/cyan reflections on puddles, flickering Hangul glyphs on pipes.
  - Animation: small “rain drip” loop in shader or flipbook.
Asset Name: mainmenu_foreground_overlay.png
- Description: A semi‐transparent obsidian vignette (20px “soft edge”) to darken screen edges, helping text/logo pop.
- File Format: PNG (alpha)
- Folder: assets/visual/overlays/
- Usage: Placed above intro_bg_loop to darken corners.

1.2 Dojang / Training Hall Background

Asset Name: dojang_floor_tex.png
- Description: 2048×2048 PBR‐style image of matte‐black tatami mats, with subtle water puddle normals (if you want dynamic reflections).
- File Format: PNG (or PNG + normal/roughness if desired)
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - Tileable so it can fill any resolution.
  - Slight neon cyan reflections at edges where wall meets floor.
Asset Name: dojang_wall_tex.png
- Description: 1024×1024 tile of corrugated metal with pipelines and emissive Hangul trigrams (☰, ☲, etc.) behind semi‐opaque panels.
- File Format: PNG (with separate emissive mask channel if you plan to animate neon flicker).
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - The emissive mask will let you “pulse” each trigram glyph via a simple shader or a flicker sprite.
Asset Name: dojang_wall_neon_flicker.png (optional flipbook)
- Description: A small flipbook (e.g. 4 frames at 256×256) showing a neon glyph flicker (cycle through 0%, 50%, 100% brightness).
- File Format: PNG sprite sheet
- Folder: assets/vfx/animations/
Asset Name: training_console_model.png
- Description: 512×512 stylized grayscale sprite of a holo‐console (flat sprite) with cyan emissive accents (for real‐time data display).
- File Format: PNG
- Folder: assets/visual/props/
- Notes: Use this as a static background element; you can overlay bitmaps of gauge bars, or simply let the console glow.
Asset Name: stance_pad_circle.png
- Description: 256×256 semi‐transparent PNG of a glowing floor circle. Pulses from 0 → 100% opacity in a 1s loop.
- File Format: PNG (alpha)
- Folder: assets/visual/props/

2. UI Icons & HUD Elements

2.1 Stance Icons

Each icon is a 64×64 px SVG (so it scales crisply). We’ll load them as textures in Pixi and tint/animate as needed.

icon_stance_defensive.svg
- Outline style in Slate Gray (#2E3538) when inactive.
- Filled with Teal Neon (#00FFC8) + soft glow when active.
icon_stance_balanced.svg
- Outline in Slate Gray; filled with Teal Neon on hover/active.
icon_stance_aggressive.svg
- Outline in Slate Gray; filled with Crimson (#FF0044) on “charged” or “ready” state, or Teal Neon when selected.
Folder: assets/ui/icons/stances/

2.2 Trigram Icons

File Names:

icon_trigram_1.svg
icon_trigram_2.svg
…
icon_trigram_8.svg
``$

\text{Each} \text{icon}: 48 \times 48 \text{px}, \text{dark} \text{background} (\text{Gunmetal} $#424A50`) with the trigram glyph in Teal Neon.
States:
- Inactive: no glow, just basic fill.
- Active: slight outer glow + subtle 1.1× scale “pulse.”
- Hover: 1.05× scale + quick glow (0.2 s).
Folder: assets/ui/icons/trigrams/

2.3 HUD Bars & Overlays

hud_health_bar.png (800×32 px PNG)
- 10 segmented blocks. Each filled segment is Cyan Glow (#1BE7FF); empty is Slate Gray.
- Folder: assets/ui/hud/
hud_pain_bar.png (800×16 px PNG)
- 10 segments. Filled segments are Crimson (#FF0044); empty Slate Gray.
- Folder: assets/ui/hud/
ui_button_start_idle.png & ui_button_start_hover.png (256×64 px each)
- Idle: Slate Gray panel with “▶ Start Combat” in Hangul+English.
- Hover: Underline in Teal Neon + icon (“▶”) glows.
- Folder: assets/ui/buttons/
ui_panel_slate.png (1024×512 px)
- A semi-opaque Slate Gray panel (70% opacity) with a subtle noise texture.
- Folder: assets/ui/panels/
tooltip_arrow.png (32×32 px PNG)
- Small triangle arrow in Cyan Glow for tooltips.
- Folder: assets/ui/tooltips/

3. Technique Animations (AnimatedSprite Sprite Sheets)

Any time you see code like:

await Assets.load("path/to/spritesheet.json");
const frames = [];
for (let i = 0; i < N; i++) {
  frames.push(Texture.from(`frame${i}.png`));
}
const anim = new AnimatedSprite(frames);

…you need a sprite sheet JSON + corresponding PNG atlas for each “technique.” Below is a minimal required set of technique animations:

3.1 Light Strike Animation (All Archetypes)

Sprite Sheet JSON: strike_light_spritesheet.json
Texture Atlas: strike_light_spritesheet.png (e.g., 512×512 containing all 6 frames laid out in a grid).
Frame Count: 6 frames, each ~128×256 (portrait orientation).
Animation Speed: 0.6 (adjust per archetype).
Visual Content: Character winds up → quick punch/kick → recoil. No background in atlas (transparent).
Folder: assets/characters/animations/techniques/light/

3.2 Medium Strike Animation

Sprite Sheet JSON: strike_medium_spritesheet.json
Texture Atlas: strike_medium_spritesheet.png (6–8 frames, ~128×256 each).
Description: More wind-up, more impact frames, a small dust puff frame integrated (see VFX).
Folder: assets/characters/animations/techniques/medium/

3.3 Heavy Strike Animation

Sprite Sheet JSON: strike_heavy_spritesheet.json
Texture Atlas: strike_heavy_spritesheet.png (8 frames, ~256×256 each).
Description: Big wind-up, slow-mo pause on impact, splash of embedded VFX dust/blood.
Folder: assets/characters/animations/techniques/heavy/

3.4 Critical Strike / Finisher Animation

Sprite Sheet JSON: strike_critical_spritesheet.json
Texture Atlas: strike_critical_spritesheet.png (10–12 frames, ~256×256).
Description: Slow-mo bone-breaking blow → flash frame → slowdown.
Folder: assets/characters/animations/techniques/critical/

3.5 Dodge / Evade Animation

Sprite Sheet JSON: dodge_spritesheet.json
Texture Atlas: dodge_spritesheet.png (4–6 frames, ~128×256).
Description: Quick sidestep/backflip frames, subtle afterimage.
Folder: assets/characters/animations/techniques/dodge/

3.6 Block / Parry Animation

Sprite Sheet JSON: block_spritesheet.json
Texture Atlas: block_spritesheet.png (5 frames, ~128×256).
Description: Character raises arm/weapon to block → recoil if successful.
Folder: assets/characters/animations/techniques/block/

3.7 Hit Reaction Animation

Sprite Sheet JSON: hit_reaction_spritesheet.json
Texture Atlas: hit_reaction_spritesheet.png (4 frames, ~128×256).
Description: Character flinches backwards, tinted red on final frame.
Folder: assets/characters/animations/techniques/hit/

3.8 Finisher Sequence (All Archetypes)

Sprite Sheet JSON: finisher_musa_spritesheet.json, finisher_amsalja_spritesheet.json, etc.
Texture Atlas: finisher_musa_spritesheet.png (12 frames, ~256×256), etc.
Description: A multi-stage “cinematic” finisher (pause → bone crushing → slow fade).
Folder: assets/characters/animations/finisher/

4. Pixi.js Dependencies & Modules Needed

import {
  Application,
  TickerPlugin, // core ticker
  ResizePlugin, // auto resizes to window
  Assets, // for loading JSON/PNG atlases
  Texture,
  Sprite,
  AnimatedSprite,
  Container,
  TilingSprite, // if you want parallax/tiled backgrounds
  Loader, // older API if you prefer Loader instead of Assets
} from "pixi.js";

Application (from app/Application.mjs)
- Creates the Pixi canvas, WebGL context, stage, etc.
TickerPlugin & ResizePlugin
- Ensures your app’s ticker (main game loop) and auto-resize functionality.

Assets (from assets/Assets.mjs)

The new recommended loader for JSON sprite sheets, PNGs, audio, etc.

Example:

await Assets.load(
  "assets/characters/animations/techniques/light/strike_light_spritesheet.json"
);

Texture (from rendering/texture/Texture.mjs)
- Create textures from loaded assets:
```
const frameTex = Texture.from("strike_light_000.png");
```
Sprite & AnimatedSprite (from scene/sprite/Sprite.mjs & scene/sprite-animated/AnimatedSprite.mjs)
- Sprite for static images (UI icons, backgrounds).
- AnimatedSprite for flipbook animations (techniques, VFX).
Container (from scene/container/Container.mjs)
- Use a parent Container for grouping layers:
  - backgroundContainer
  - characterContainer
  - uiContainer
  - vfxContainer
TilingSprite (from scene/sprite-tiling/TilingSprite.mjs)
- If you want to scroll/loop the intro_bg_loop.png or tile dojang_floor_tex.png seamlessly across a larger stage.
Loader (from assets/loader/Loader.mjs)
- If you prefer the older PIXI.Loader API to Assets. Both are possible; Assets is recommended for newer Pixi versions.
Filter / BlurFilter / DisplacementFilter (from filters/defaults/*)
- Useful for adding real-time blur afterimages (for dodge), screen shakes, or ripples when powering up Ki (ki_charge).

5. Directory Structure & Final Checklist

Below is a consolidated folder structure showing where each of the above assets live. This is what your repo (or build pipeline) needs before you start coding the Pixi setup:

/assets
├─ characters/
│  ├─ animations/
│  │   ├─ techniques/
│  │   │   ├─ light/
│  │   │   │   ├─ strike_light_spritesheet.json
│  │   │   │   └─ strike_light_spritesheet.png
│  │   │   ├─ medium/
│  │   │   │   ├─ strike_medium_spritesheet.json
│  │   │   │   └─ strike_medium_spritesheet.png
│  │   │   ├─ heavy/
│  │   │   │   ├─ strike_heavy_spritesheet.json
│  │   │   │   └─ strike_heavy_spritesheet.png
│  │   │   ├─ critical/
│  │   │   │   ├─ strike_critical_spritesheet.json
│  │   │   │   └─ strike_critical_spritesheet.png
│  │   │   ├─ dodge/
│  │   │     │   │   │   ├─ dodge_spritesheet.json
│  │   │   │   └─ dodge_spritesheet.png
│  │   │   ├─ block/
│  │   │   │   ├─ block_spritesheet.json
│  │   │   │   └─ block_spritesheet.png
│  │   │   └─ hit/
│  │   │       ├─ hit_reaction_spritesheet.json
│  │   │       └─ hit_reaction_spritesheet.png
│  │   └─ finisher/
│  │       ├─ musa_finisher_spritesheet.json
│  │       └─ musa_finisher_spritesheet.png
│  │       ├─ amsalja_finisher_spritesheet.json
│  │       └─ amsalja_finisher_spritesheet.png
│  │       └─ … (one per archetype)
│  └─ portraits/
│      ├─ portrait_musa.png
│      ├─ portrait_amsalja.png
│      └─ … (other archetypes)
│
├─ fonts/
│  ├─ BlackTrigram-Hangul.woff2
│  ├─ NotoSansKR-Regular.woff2
│  └─ Roboto-Regular.woff2
│
├─ i18n/
│  ├─ ko.json
│  └─ en.json
│
├─ props/
│  ├─ training_console_model.png
│  ├─ stance_pad_circle.png
│  └─ dummy_target_overlay.svg
│
├─ shaders/
│  ├─ rim_light.shader
│  ├─ blood_decal.shader
│  └─ neon_flicker.shader
│
├─ ui/
│  ├─ buttons/
│  │   ├─ ui_button_start_idle.png
│  │   └─ ui_button_start_hover.png
│  ├─ icons/
│  │   ├─ stances/
│  │   │   ├─ icon_stance_defensive.svg
│  │   │   ├─ icon_stance_balanced.svg
│  │   │   └─ icon_stance_aggressive.svg
│  │   ├─ trigrams/
│  │   │   ├─ icon_trigram_1.svg
│  │   │   ├─ icon_trigram_2.svg
│  │   │   └─ … up to icon_trigram_8.svg
│  │   └─ tooltip_arrow.png
│  └─ hud/
│      ├─ hud_health_bar.png
│      └─ hud_pain_bar.png
│
├─ vfx/
│  ├─ animations/
│  │   ├─ anim_logo_pulse.json
│  │   ├─ anim_menu_slide_0.png … anim_menu_slide_7.png
│  │   ├─ anim_strike_impact_0.png … anim_strike_impact_15.png
│  │   └─ anim_finisher_musa_0.png … anim_finisher_musa_11.png
│  ├─ particles/
│  │   ├─ vfx_dust_puff.png
│  │   ├─ vfx_blood_splatter.png
│  │   └─ confetti_sprites.png
│  └─ shaders/
│      ├─ vfx_impact_ring.png
│      ├─ vfx_neon_glow.png
│      └─ vfx_critical_flash.png
│
├─ visual/
│  ├─ bg/
│  │   ├─ intro/
│  │   │   ├─ intro_bg_loop.png
│  │   │   └─ mainmenu_foreground_overlay.png
│  │   └─ dojang/
│  │       ├─ dojang_floor_tex.png
│  │       └─ dojang_wall_tex.png
│  └─ overlays/
│      ├─ vital_region_head.png
│      ├─ vital_region_neck.png
│      ├─ vital_region_torso.png
│      ├─ vital_region_arms.png
│      ├─ vital_region_chest.png
│      └─ vital_region_legs.png
│
└─ public/
   └─ assets/
       └─ audio/
           ├─ music/
           │   ├─ intro_theme.webm
           │   ├─ combat_theme.webm
           │   ├─ combat_theme_geon.webm
           │   ├─ training_theme.webm
           │   ├─ meditation_theme.webm
           │   ├─ victory_theme.webm
           │   ├─ underground_rave_theme.webm
           │   └─ ambient_loop.webm
           └─ sfx/
               ├─ ambient/
               │   ├─ dojang_ambience.webm
               │   ├─ wind_effect.webm
               │   └─ dojo_crowd.webm
               ├─ attacks/
               │   ├─ attack_punch_light.webm
               │   ├─ attack_punch_medium.webm
               │   ├─ attack_kick_heavy.webm
               │   ├─ attack_light.webm
               │   ├─ attack_medium.webm
               │   ├─ attack_critical.webm
               │   ├─ attack_special_geon.webm
               │   ├─ dodge.webm
               │   ├─ block_success.webm
               │   ├─ block_break.webm
               │   └─ perfect_strike.webm
               ├─ hit/
               │   ├─ hit_light.webm
               │   ├─ hit_medium.webm
               │   ├─ hit_heavy.webm
               │   ├─ hit_critical.webm
               │   ├─ hit_flesh.webm
               │   └─ hit_block.webm
               ├─ combo/
               │   ├─ combo_buildup.webm
               │   ├─ combo_finish.webm
               │   └─ energy_pulse.webm
               ├─ match/
               │   ├─ match_start.webm
               │   ├─ countdown.webm
               │   ├─ match_end.webm
               │   ├─ victory.webm
               │   └─ defeat.webm
               ├─ movement/
               │   ├─ footstep.webm
               │   └─ stance_change.webm
               ├─ ki/
               │   ├─ ki_charge.webm
               │   └─ ki_release.webm
               ├─ stamina/
               │   └─ stamina_depleted.webm
               ├─ health/
               │   └─ health_low.webm
               └─ ui/
                   ├─ menu_click.webm
                   ├─ menu_navigate.webm
                   ├─ menu_select.webm
                   ├─ menu_hover.webm
                   └─ menu_back.webm

1. Backgrounds & Environments

Asset Name: intro_bg_loop.png
- Description: A seamless 1920×1080 loopable tile of a rain‐slicked concrete floor with neon pipes and drifting data‐line grid.
- File Format: PNG (plus normal/roughness if you want subtle 3D lighting on flat sprites, but PNG is usually enough).
- Folder: assets/visual/bg/intro/
- Visual Style Notes:
  - Base color: Obsidian (#0A0F12) with subtle film‐grain overlay.
  - Neon accents: teal/cyan reflections on puddles, flickering Hangul glyphs on pipes.
  - Animation: small “rain drip” loop in shader or flipbook.
Asset Name: mainmenu_foreground_overlay.png
- Description: A semi‐transparent obsidian vignette (20px “soft edge”) to darken screen edges, helping text/logo pop.
- File Format: PNG (alpha)
- Folder: assets/visual/overlays/
- Usage: Placed above intro_bg_loop to darken corners.

1.2 Dojang / Training Hall Background

Asset Name: dojang_floor_tex.png
- Description: 2048×2048 PBR‐style image of matte‐black tatami mats, with subtle water puddle normals (if you want dynamic reflections).
- File Format: PNG (or PNG + normal/roughness if desired)
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - Tileable so it can fill any resolution.
  - Slight neon cyan reflections at edges where wall meets floor.
Asset Name: dojang_wall_tex.png
- Description: 1024×1024 tile of corrugated metal with pipelines and emissive Hangul trigrams (☰, ☲, etc.) behind semi‐opaque panels.
- File Format: PNG (with separate emissive mask channel if you plan to animate neon flicker).
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - The emissive mask will let you “pulse” each trigram glyph via a simple shader or a flicker sprite.
Asset Name: dojang_wall_neon_flicker.png (optional flipbook)
- Description: A small flipbook (e.g. 4 frames at 256×256) showing a neon glyph flicker (cycle through 0%, 50%, 100% brightness).
- File Format: PNG sprite sheet
- Folder: assets/vfx/animations/
Asset Name: training_console_model.png
- Description: 512×512 stylized grayscale sprite of a holo‐console (flat sprite) with cyan emissive accents (for real‐time data display).
- File Format: PNG
- Folder: assets/visual/props/
- Notes: Use this as a static background element; you can overlay bitmaps of gauge bars, or simply let the console glow.
Asset Name: stance_pad_circle.png
- Description: 256×256 semi‐transparent PNG of a glowing floor circle. Pulses from 0 → 100% opacity in a 1s loop.
- File Format: PNG (alpha)
- Folder: assets/visual/props/

2. UI Icons & HUD Elements

2.1 Stance Icons

Each icon is a 64×64 px SVG (so it scales crisply). We’ll load them as textures in Pixi and tint/animate as needed.

icon_stance_defensive.svg
- Outline style in Slate Gray (#2E3538) when inactive.
- Filled with Teal Neon (#00FFC8) + soft glow when active.
icon_stance_balanced.svg
- Outline in Slate Gray; filled with Teal Neon on hover/active.
icon_stance_aggressive.svg
- Outline in Slate Gray; filled with Crimson (#FF0044) on “charged” or “ready” state, or Teal Neon when selected.
Folder: assets/ui/icons/stances/

2.2 Trigram Icons

File Names:

icon_trigram_1.svg
icon_trigram_2.svg
…
icon_trigram_8.svg
``$

\text{Each} \text{icon}: 48 \times 48 \text{px}, \text{dark} \text{background} (\text{Gunmetal} $#424A50`) with the trigram glyph in Teal Neon.
States:
- Inactive: no glow, just basic fill.
- Active: slight outer glow + subtle 1.1× scale “pulse.”
- Hover: 1.05× scale + quick glow (0.2 s).
Folder: assets/ui/icons/trigrams/

2.3 HUD Bars & Overlays

hud_health_bar.png (800×32 px PNG)
- 10 segmented blocks. Each filled segment is Cyan Glow (#1BE7FF); empty is Slate Gray.
- Folder: assets/ui/hud/
hud_pain_bar.png (800×16 px PNG)
- 10 segments. Filled segments are Crimson (#FF0044); empty Slate Gray.
- Folder: assets/ui/hud/
ui_button_start_idle.png & ui_button_start_hover.png (256×64 px each)
- Idle: Slate Gray panel with “▶ Start Combat” in Hangul+English.
- Hover: Underline in Teal Neon + icon (“▶”) glows.
- Folder: assets/ui/buttons/
ui_panel_slate.png (1024×512 px)
- A semi-opaque Slate Gray panel (70% opacity) with a subtle noise texture.
- Folder: assets/ui/panels/
tooltip_arrow.png (32×32 px PNG)
- Small triangle arrow in Cyan Glow for tooltips.
- Folder: assets/ui/tooltips/

3. Technique Animations (AnimatedSprite Sprite Sheets)

Any time you see code like:

await Assets.load("path/to/spritesheet.json");
const frames = [];
for (let i = 0; i < N; i++) {
  frames.push(Texture.from(`frame${i}.png`));
}
const anim = new AnimatedSprite(frames);

…you need a sprite sheet JSON + corresponding PNG atlas for each “technique.” Below is a minimal required set of technique animations:

3.1 Light Strike Animation (All Archetypes)

Sprite Sheet JSON: strike_light_spritesheet.json
Texture Atlas: strike_light_spritesheet.png (e.g., 512×512 containing all 6 frames laid out in a grid).
Frame Count: 6 frames, each ~128×256 (portrait orientation).
Animation Speed: 0.6 (adjust per archetype).
Visual Content: Character winds up → quick punch/kick → recoil. No background in atlas (transparent).
Folder: assets/characters/animations/techniques/light/

3.2 Medium Strike Animation

Sprite Sheet JSON: strike_medium_spritesheet.json
Texture Atlas: strike_medium_spritesheet.png (6–8 frames, ~128×256 each).
Description: More wind-up, more impact frames, a small dust puff frame integrated (see VFX).
Folder: assets/characters/animations/techniques/medium/

3.3 Heavy Strike Animation

Sprite Sheet JSON: strike_heavy_spritesheet.json
Texture Atlas: strike_heavy_spritesheet.png (8 frames, ~256×256 each).
Description: Big wind-up, slow-mo pause on impact, splash of embedded VFX dust/blood.
Folder: assets/characters/animations/techniques/heavy/

3.4 Critical Strike / Finisher Animation

Sprite Sheet JSON: strike_critical_spritesheet.json
Texture Atlas: strike_critical_spritesheet.png (10–12 frames, ~256×256).
Description: Slow-mo bone-breaking blow → flash frame → slowdown.
Folder: assets/characters/animations/techniques/critical/

3.5 Dodge / Evade Animation

Sprite Sheet JSON: dodge_spritesheet.json
Texture Atlas: dodge_spritesheet.png (4–6 frames, ~128×256).
Description: Quick sidestep/backflip frames, subtle afterimage.
Folder: assets/characters/animations/techniques/dodge/

3.6 Block / Parry Animation

Sprite Sheet JSON: block_spritesheet.json
Texture Atlas: block_spritesheet.png (5 frames, ~128×256).
Description: Character raises arm/weapon to block → recoil if successful.
Folder: assets/characters/animations/techniques/block/

3.7 Hit Reaction Animation

Sprite Sheet JSON: hit_reaction_spritesheet.json
Texture Atlas: hit_reaction_spritesheet.png (4 frames, ~128×256).
Description: Character flinches backwards, tinted red on final frame.
Folder: assets/characters/animations/techniques/hit/

3.8 Finisher Sequence (All Archetypes)

Sprite Sheet JSON: finisher_musa_spritesheet.json, finisher_amsalja_spritesheet.json, etc.
Texture Atlas: finisher_musa_spritesheet.png (12 frames, ~256×256), etc.
Description: A multi-stage “cinematic” finisher (pause → bone crushing → slow fade).
Folder: assets/characters/animations/finisher/

4. Pixi.js Dependencies & Modules Needed

import {
  Application,
  TickerPlugin, // core ticker
  ResizePlugin, // auto resizes to window
  Assets, // for loading JSON/PNG atlases
  Texture,
  Sprite,
  AnimatedSprite,
  Container,
  TilingSprite, // if you want parallax/tiled backgrounds
  Loader, // older API if you prefer Loader instead of Assets
} from "pixi.js";

Application (from app/Application.mjs)
- Creates the Pixi canvas, WebGL context, stage, etc.
TickerPlugin & ResizePlugin
- Ensures your app’s ticker (main game loop) and auto-resize functionality.

Assets (from assets/Assets.mjs)

The new recommended loader for JSON sprite sheets, PNGs, audio, etc.

Example:

await Assets.load(
  "assets/characters/animations/techniques/light/strike_light_spritesheet.json"
);

Texture (from rendering/texture/Texture.mjs)
- Create textures from loaded assets:
```
const frameTex = Texture.from("strike_light_000.png");
```
Sprite & AnimatedSprite (from scene/sprite/Sprite.mjs & scene/sprite-animated/AnimatedSprite.mjs)
- Sprite for static images (UI icons, backgrounds).
- AnimatedSprite for flipbook animations (techniques, VFX).
Container (from scene/container/Container.mjs)
- Use a parent Container for grouping layers:
  - backgroundContainer
  - characterContainer
  - uiContainer
  - vfxContainer
TilingSprite (from scene/sprite-tiling/TilingSprite.mjs)
- If you want to scroll/loop the intro_bg_loop.png or tile dojang_floor_tex.png seamlessly across a larger stage.
Loader (from assets/loader/Loader.mjs)
- If you prefer the older PIXI.Loader API to Assets. Both are possible; Assets is recommended for newer Pixi versions.
Filter / BlurFilter / DisplacementFilter (from filters/defaults/*)
- Useful for adding real-time blur afterimages (for dodge), screen shakes, or ripples when powering up Ki (ki_charge).

5. Directory Structure & Final Checklist

Below is a consolidated folder structure showing where each of the above assets live. This is what your repo (or build pipeline) needs before you start coding the Pixi setup:

/assets
├─ characters/
│  ├─ animations/
│  │   ├─ techniques/
│  │   │   ├─ light/
│  │   │   │   ├─ strike_light_spritesheet.json
│  │   │   │   └─ strike_light_spritesheet.png
│  │   │   ├─ medium/
│  │   │   │   ├─ strike_medium_spritesheet.json
│  │   │   │   └─ strike_medium_spritesheet.png
│  │   │   ├─ heavy/
│  │   │   │   ├─ strike_heavy_spritesheet.json
│  │   │   │   └─ strike_heavy_spritesheet.png
│  │   │   ├─ critical/
│  │   │   │   ├─ strike_critical_spritesheet.json
│  │   │   │   └─ strike_critical_spritesheet.png
│  │   │   ├─ dodge/
│  │   │   │   ├─ dodge_spritesheet.json
│  │   │   │   └─ dodge_spritesheet.png
│  │   │   ├─ block/
│  │   │   │   ├─ block_spritesheet.json
│  │   │   │   └─ block_spritesheet.png
│  │   │   └─ hit/
│  │   │       ├─ hit_reaction_spritesheet.json
│  │   │       └─ hit_reaction_spritesheet.png
│  │   └─ finisher/
│  │       ├─ musa_finisher_spritesheet.json
│  │       └─ musa_finisher_spritesheet.png
│  │       ├─ amsalja_finisher_spritesheet.json
│  │       └─ amsalja_finisher_spritesheet.png
│  │       └─ … (one per archetype)
│  └─ portraits/
│      ├─ portrait_musa.png
│      ├─ portrait_amsalja.png
│      └─ … (other archetypes)
│
├─ fonts/
│  ├─ BlackTrigram-Hangul.woff2
│  ├─ NotoSansKR-Regular.woff2
│  └─ Roboto-Regular.woff2
│
├─ i18n/
│  ├─ ko.json
│  └─ en.json
│
├─ props/
│  ├─ training_console_model.png
│  ├─ stance_pad_circle.png
│  └─ dummy_target_overlay.svg
│
├─ shaders/
│  ├─ rim_light.shader
│  ├─ blood_decal.shader
│  └─ neon_flicker.shader
│
├─ ui/
│  ├─ buttons/
│  │   ├─ ui_button_start_idle.png
│  │   └─ ui_button_start_hover.png
│  ├─ icons/
│  │   ├─ stances/
│  │   │   ├─ icon_stance_defensive.svg
│  │   │   ├─ icon_stance_balanced.svg
│  │   │   └─ icon_stance_aggressive.svg
│  │   ├─ trigrams/
│  │   │   ├─ icon_trigram_1.svg
│  │   │   ├─ icon_trigram_2.svg
│  │   │   └─ … up to icon_trigram_8.svg
│  │   └─ tooltip_arrow.png
│  └─ hud/
│      ├─ hud_health_bar.png
│      └─ hud_pain_bar.png
│
├─ vfx/
│  ├─ animations/
│  │   ├─ anim_logo_pulse.json
│  │   ├─ anim_menu_slide_0.png … anim_menu_slide_7.png
│  │   ├─ anim_strike_impact_0.png … anim_strike_impact_15.png
│  │   └─ anim_finisher_musa_0.png … anim_finisher_musa_11.png
│  ├─ particles/
│  │   ├─ vfx_dust_puff.png
│  │   ├─ vfx_blood_splatter.png
│  │   └─ confetti_sprites.png
│  └─ shaders/
│      ├─ vfx_impact_ring.png
│      ├─ vfx_neon_glow.png
│      └─ vfx_critical_flash.png
│
├─ visual/
│  ├─ bg/
│  │   ├─ intro/
│  │   │   ├─ intro_bg_loop.png
│  │   │   └─ mainmenu_foreground_overlay.png
│  │   └─ dojang/
│  │       ├─ dojang_floor_tex.png
│  │       └─ dojang_wall_tex.png
│  └─ overlays/
│      ├─ vital_region_head.png
│      ├─ vital_region_neck.png
│      ├─ vital_region_torso.png
│      ├─ vital_region_arms.png
│      ├─ vital_region_chest.png
│      └─ vital_region_legs.png
│
└─ public/
   └─ assets/
       └─ audio/
           ├─ music/
           │   ├─ intro_theme.webm
           │   ├─ combat_theme.webm
           │   ├─ combat_theme_geon.webm
           │   ├─ training_theme.webm
           │   ├─ meditation_theme.webm
           │   ├─ victory_theme.webm
           │   ├─ underground_rave_theme.webm
           │   └─ ambient_loop.webm
           └─ sfx/
               ├─ ambient/
               │   ├─ dojang_ambience.webm
               │   ├─ wind_effect.webm
               │   └─ dojo_crowd.webm
               ├─ attacks/
               │   ├─ attack_punch_light.webm
               │   ├─ attack_punch_medium.webm
               │   ├─ attack_kick_heavy.webm
               │   ├─ attack_light.webm
               │   ├─ attack_medium.webm
               │   ├─ attack_critical.webm
               │   ├─ attack_special_geon.webm
               │   ├─ dodge.webm
               │   ├─ block_success.webm
               │   ├─ block_break.webm
               │   └─ perfect_strike.webm
               ├─ hit/
               │   ├─ hit_light.webm
               │   ├─ hit_medium.webm
               │   ├─ hit_heavy.webm
               │   ├─ hit_critical.webm
               │   ├─ hit_flesh.webm
               │   └─ hit_block.webm
               ├─ combo/
               │   ├─ combo_buildup.webm
               │   ├─ combo_finish.webm
               │   └─ energy_pulse.webm
               ├─ match/
               │   ├─ match_start.webm
               │   ├─ countdown.webm
               │   ├─ match_end.webm
               │   ├─ victory.webm
               │   └─ defeat.webm
               ├─ movement/
               │   ├─ footstep.webm
               │   └─ stance_change.webm
               ├─ ki/
               │   ├─ ki_charge.webm
               │   └─ ki_release.webm
               ├─ stamina/
               │   └─ stamina_depleted.webm
               ├─ health/
               │   └─ health_low.webm
               └─ ui/
                   ├─ menu_click.webm
                   ├─ menu_navigate.webm
                   ├─ menu_select.webm
                   ├─ menu_hover.webm
                   └─ menu_back.webm

1. Backgrounds & Environments

Asset Name: intro_bg_loop.png
- Description: A seamless 1920×1080 loopable tile of a rain‐slicked concrete floor with neon pipes and drifting data‐line grid.
- File Format: PNG (plus normal/roughness if you want subtle 3D lighting on flat sprites, but PNG is usually enough).
- Folder: assets/visual/bg/intro/
- Visual Style Notes:
  - Base color: Obsidian (#0A0F12) with subtle film‐grain overlay.
  - Neon accents: teal/cyan reflections on puddles, flickering Hangul glyphs on pipes.
  - Animation: small “rain drip” loop in shader or flipbook.
Asset Name: mainmenu_foreground_overlay.png
- Description: A semi‐transparent obsidian vignette (20px “soft edge”) to darken screen edges, helping text/logo pop.
- File Format: PNG (alpha)
- Folder: assets/visual/overlays/
- Usage: Placed above intro_bg_loop to darken corners.

1.2 Dojang / Training Hall Background

Asset Name: dojang_floor_tex.png
- Description: 2048×2048 PBR‐style image of matte‐black tatami mats, with subtle water puddle normals (if you want dynamic reflections).
- File Format: PNG (or PNG + normal/roughness if desired)
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - Tileable so it can fill any resolution.
  - Slight neon cyan reflections at edges where wall meets floor.
Asset Name: dojang_wall_tex.png
- Description: 1024×1024 tile of corrugated metal with pipelines and emissive Hangul trigrams (☰, ☲, etc.) behind semi‐opaque panels.
- File Format: PNG (with separate emissive mask channel if you plan to animate neon flicker).
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - The emissive mask will let you “pulse” each trigram glyph via a simple shader or a flicker sprite.
Asset Name: dojang_wall_neon_flicker.png (optional flipbook)
- Description: A small flipbook (e.g. 4 frames at 256×256) showing a neon glyph flicker (cycle through 0%, 50%, 100% brightness).
- File Format: PNG sprite sheet
- Folder: assets/vfx/animations/
Asset Name: training_console_model.png
- Description: 512×512 stylized grayscale sprite of a holo‐console (flat sprite) with cyan emissive accents (for real‐time data display).
- File Format: PNG
- Folder: assets/visual/props/
- Notes: Use this as a static background element; you can overlay bitmaps of gauge bars, or simply let the console glow.
Asset Name: stance_pad_circle.png
- Description: 256×256 semi‐transparent PNG of a glowing floor circle. Pulses from 0 → 100% opacity in a 1s loop.
- File Format: PNG (alpha)
- Folder: assets/visual/props/

2. UI Icons & HUD Elements

2.1 Stance Icons

Each icon is a 64×64 px SVG (so it scales crisply). We’ll load them as textures in Pixi and tint/animate as needed.

icon_stance_defensive.svg
- Outline style in Slate Gray (#2E3538) when inactive.
- Filled with Teal Neon (#00FFC8) + soft glow when active.
icon_stance_balanced.svg
- Outline in Slate Gray; filled with Teal Neon on hover/active.
icon_stance_aggressive.svg
- Outline in Slate Gray; filled with Crimson (#FF0044) on “charged” or “ready” state, or Teal Neon when selected.
Folder: assets/ui/icons/stances/

2.2 Trigram Icons

File Names:

icon_trigram_1.svg
icon_trigram_2.svg
…
icon_trigram_8.svg
``$

\text{Each} \text{icon}: 48 \times 48 \text{px}, \text{dark} \text{background} (\text{Gunmetal} $#424A50`) with the trigram glyph in Teal Neon.
States:
- Inactive: no glow, just basic fill.
- Active: slight outer glow + subtle 1.1× scale “pulse.”
- Hover: 1.05× scale + quick glow (0.2 s).
Folder: assets/ui/icons/trigrams/

2.3 HUD Bars & Overlays

hud_health_bar.png (800×32 px PNG)
- 10 segmented blocks. Each filled segment is Cyan Glow (#1BE7FF); empty is Slate Gray.
- Folder: assets/ui/hud/
hud_pain_bar.png (800×16 px PNG)
- 10 segments. Filled segments are Crimson (#FF0044); empty Slate Gray.
- Folder: assets/ui/hud/
ui_button_start_idle.png & ui_button_start_hover.png (256×64 px each)
- Idle: Slate Gray panel with “▶ Start Combat” in Hangul+English.
- Hover: Underline in Teal Neon + icon (“▶”) glows.
- Folder: assets/ui/buttons/
ui_panel_slate.png (1024×512 px)
- A semi-opaque Slate Gray panel (70% opacity) with a subtle noise texture.
- Folder: assets/ui/panels/
tooltip_arrow.png (32×32 px PNG)
- Small triangle arrow in Cyan Glow for tooltips.
- Folder: assets/ui/tooltips/

3. Technique Animations (AnimatedSprite Sprite Sheets)

Any time you see code like:

await Assets.load("path/to/spritesheet.json");
const frames = [];
for (let i = 0; i < N; i++) {
  frames.push(Texture.from(`frame${i}.png`));
}
const anim = new AnimatedSprite(frames);

…you need a sprite sheet JSON + corresponding PNG atlas for each “technique.” Below is a minimal required set of technique animations:

3.1 Light Strike Animation (All Archetypes)

Sprite Sheet JSON: strike_light_spritesheet.json
Texture Atlas: strike_light_spritesheet.png (e.g., 512×512 containing all 6 frames laid out in a grid).
Frame Count: 6 frames, each ~128×256 (portrait orientation).
Animation Speed: 0.6 (adjust per archetype).
Visual Content: Character winds up → quick punch/kick → recoil. No background in atlas (transparent).
Folder: assets/characters/animations/techniques/light/

3.2 Medium Strike Animation

Sprite Sheet JSON: strike_medium_spritesheet.json
Texture Atlas: strike_medium_spritesheet.png (6–8 frames, ~128×256 each).
Description: More wind-up, more impact frames, a small dust puff frame integrated (see VFX).
Folder: assets/characters/animations/techniques/medium/

3.3 Heavy Strike Animation

Sprite Sheet JSON: strike_heavy_spritesheet.json
Texture Atlas: strike_heavy_spritesheet.png (8 frames, ~256×256 each).
Description: Big wind-up, slow-mo pause on impact, splash of embedded VFX dust/blood.
Folder: assets/characters/animations/techniques/heavy/

3.4 Critical Strike / Finisher Animation

Sprite Sheet JSON: strike_critical_spritesheet.json
Texture Atlas: strike_critical_spritesheet.png (10–12 frames, ~256×256).
Description: Slow-mo bone-breaking blow → flash frame → slowdown.
Folder: assets/characters/animations/techniques/critical/

3.5 Dodge / Evade Animation

Sprite Sheet JSON: dodge_spritesheet.json
Texture Atlas: dodge_spritesheet.png (4–6 frames, ~128×256).
Description: Quick sidestep/backflip frames, subtle afterimage.
Folder: assets/characters/animations/techniques/dodge/

3.6 Block / Parry Animation

Sprite Sheet JSON: block_spritesheet.json
Texture Atlas: block_spritesheet.png (5 frames, ~128×256).
Description: Character raises arm/weapon to block → recoil if successful.
Folder: assets/characters/animations/techniques/block/

3.7 Hit Reaction Animation

Sprite Sheet JSON: hit_reaction_spritesheet.json
Texture Atlas: hit_reaction_spritesheet.png (4 frames, ~128×256).
Description: Character flinches backwards, tinted red on final frame.
Folder: assets/characters/animations/techniques/hit/

3.8 Finisher Sequence (All Archetypes)

Sprite Sheet JSON: finisher_musa_spritesheet.json, finisher_amsalja_spritesheet.json, etc.
Texture Atlas: finisher_musa_spritesheet.png (12 frames, ~256×256), etc.
Description: A multi-stage “cinematic” finisher (pause → bone crushing → slow fade).
Folder: assets/characters/animations/finisher/

4. Pixi.js Dependencies & Modules Needed

import {
  Application,
  TickerPlugin, // core ticker
  ResizePlugin, // auto resizes to window
  Assets, // for loading JSON/PNG atlases
  Texture,
  Sprite,
  AnimatedSprite,
  Container,
  TilingSprite, // if you want parallax/tiled backgrounds
  Loader, // older API if you prefer Loader instead of Assets
} from "pixi.js";

Application (from app/Application.mjs)
- Creates the Pixi canvas, WebGL context, stage, etc.
TickerPlugin & ResizePlugin
- Ensures your app’s ticker (main game loop) and auto-resize functionality.

Assets (from assets/Assets.mjs)

The new recommended loader for JSON sprite sheets, PNGs, audio, etc.

Example:

await Assets.load(
  "assets/characters/animations/techniques/light/strike_light_spritesheet.json"
);

Texture (from rendering/texture/Texture.mjs)
- Create textures from loaded assets:
```
const frameTex = Texture.from("strike_light_000.png");
```
Sprite & AnimatedSprite (from scene/sprite/Sprite.mjs & scene/sprite-animated/AnimatedSprite.mjs)
- Sprite for static images (UI icons, backgrounds).
- AnimatedSprite for flipbook animations (techniques, VFX).
Container (from scene/container/Container.mjs)
- Use a parent Container for grouping layers:
  - backgroundContainer
  - characterContainer
  - uiContainer
  - vfxContainer
TilingSprite (from scene/sprite-tiling/TilingSprite.mjs)
- If you want to scroll/loop the intro_bg_loop.png or tile dojang_floor_tex.png seamlessly across a larger stage.
Loader (from assets/loader/Loader.mjs)
- If you prefer the older PIXI.Loader API to Assets. Both are possible; Assets is recommended for newer Pixi versions.
Filter / BlurFilter / DisplacementFilter (from filters/defaults/*)
- Useful for adding real-time blur afterimages (for dodge), screen shakes, or ripples when powering up Ki (ki_charge).

5. Directory Structure & Final Checklist

Below is a consolidated folder structure showing where each of the above assets live. This is what your repo (or build pipeline) needs before you start coding the Pixi setup:

/assets
├─ characters/
│  ├─ animations/
│  │   ├─ techniques/
│  │   │   ├─ light/
│  │   │   │   ├─ strike_light_spritesheet.json
│  │   │   │   └─ strike_light_spritesheet.png
│  │   │   ├─ medium/
│  │   │   │   ├─ strike_medium_spritesheet.json
│  │   │   │   └─ strike_medium_spritesheet.png
│  │   │   ├─ heavy/
│  │   │   │   ├─ strike_heavy_spritesheet.json
│  │   │   │   └─ strike_heavy_spritesheet.png
│  │   │   ├─ critical/
│  │   │   │   ├─ strike_critical_spritesheet.json
│  │   │   │   └─ strike_critical_spritesheet.png
│  │   │   ├─ dodge/
│  │   │   │   ├─ dodge_spritesheet.json
│  │   │   │   └─ dodge_spritesheet.png
│  │   │   ├─ block/
│  │   │   │   ├─ block_spritesheet.json
│  │   │   │   └─ block_spritesheet.png
│  │   │   └─ hit/
│  │   │       ├─ hit_reaction_spritesheet.json
│  │   │       └─ hit_reaction_spritesheet.png
│  │   └─ finisher/
│  │       ├─ musa_finisher_spritesheet.json
│  │       └─ musa_finisher_spritesheet.png
│  │       ├─ amsalja_finisher_spritesheet.json
│  │       └─ amsalja_finisher_spritesheet.png
│  │       └─ … (one per archetype)
│  └─ portraits/
│      ├─ portrait_musa.png
│      ├─ portrait_amsalja.png
│      └─ … (other archetypes)
│
├─ fonts/
│  ├─ BlackTrigram-Hangul.woff2
│  ├─ NotoSansKR-Regular.woff2
│  └─ Roboto-Regular.woff2
│
├─ i18n/
│  ├─ ko.json
│  └─ en.json
│
├─ props/
│  ├─ training_console_model.png
│  ├─ stance_pad_circle.png
│  └─ dummy_target_overlay.svg
│
├─ shaders/
│  ├─ rim_light.shader
│  ├─ blood_decal.shader
│  └─ neon_flicker.shader
│
├─ ui/
│  ├─ buttons/
│  │   ├─ ui_button_start_idle.png
│  │   └─ ui_button_start_hover.png
│  ├─ icons/
│  │   ├─ stances/
│  │   │   ├─ icon_stance_defensive.svg
│  │   │   ├─ icon_stance_balanced.svg
│  │   │   └─ icon_stance_aggressive.svg
│  │   ├─ trigrams/
│  │   │   ├─ icon_trigram_1.svg
│  │   │   ├─ icon_trigram_2.svg
│  │   │   └─ … up to icon_trigram_8.svg
│  │   └─ tooltip_arrow.png
│  └─ hud/
│      ├─ hud_health_bar.png
│      └─ hud_pain_bar.png
│
├─ vfx/
│  ├─ animations/
│  │   ├─ anim_logo_pulse.json
│  │   ├─ anim_menu_slide_0.png … anim_menu_slide_7.png
│  │   ├─ anim_strike_impact_0.png … anim_strike_impact_15.png
│  │   └─ anim_finisher_musa_0.png … anim_finisher_musa_11.png
│  ├─ particles/
│  │   ├─ vfx_dust_puff.png
│  │   ├─ vfx_blood_splatter.png
│  │   └─ confetti_sprites.png
│  └─ shaders/
│      ├─ vfx_impact_ring.png
│      ├─ vfx_neon_glow.png
│      └─ vfx_critical_flash.png
│
├─ visual/
│  ├─ bg/
│  │   ├─ intro/
│  │   │   ├─ intro_bg_loop.png
│  │   │   └─ mainmenu_foreground_overlay.png
│  │   └─ dojang/
│  │       ├─ dojang_floor_tex.png
│  │       └─ dojang_wall_tex.png
│  └─ overlays/
│      ├─ vital_region_head.png
│      ├─ vital_region_neck.png
│      ├─ vital_region_torso.png
│      ├─ vital_region_arms.png
│      ├─ vital_region_chest.png
│      └─ vital_region_legs.png
│
└─ public/
   └─ assets/
       └─ audio/
           ├─ music/
           │   ├─ intro_theme.webm
           │   ├─ combat_theme.webm
           │   ├─ combat_theme_geon.webm
           │   ├─ training_theme.webm
           │   ├─ meditation_theme.webm
           │   ├─ victory_theme.webm
           │   ├─ underground_rave_theme.webm
           │   └─ ambient_loop.webm
           └─ sfx/
               ├─ ambient/
               │   ├─ dojang_ambience.webm
               │   ├─ wind_effect.webm
               │   └─ dojo_crowd.webm
               ├─ attacks/
               │   ├─ attack_punch_light.webm
               │   ├─ attack_punch_medium.webm
               │   ├─ attack_kick_heavy.webm
               │   ├─ attack_light.webm
               │   ├─ attack_medium.webm
               │   ├─ attack_critical.webm
               │   ├─ attack_special_geon.webm
               │   ├─ dodge.webm
               │   ├─ block_success.webm
               │   ├─ block_break.webm
               │   └─ perfect_strike.webm
               ├─ hit/
               │   ├─ hit_light.webm
               │   ├─ hit_medium.webm
               │   ├─ hit_heavy.webm
               │   ├─ hit_critical.webm
               │   ├─ hit_flesh.webm
               │   └─ hit_block.webm
               ├─ combo/
               │   ├─ combo_buildup.webm
               │   ├─ combo_finish.webm
               │   └─ energy_pulse.webm
               ├─ match/
               │   ├─ match_start.webm
               │   ├─ countdown.webm
               │   ├─ match_end.webm
               │   ├─ victory.webm
               │   └─ defeat.webm
               ├─ movement/
               │   ├─ footstep.webm
               │   └─ stance_change.webm
               ├─ ki/
               │   ├─ ki_charge.webm
               │   └─ ki_release.webm
               ├─ stamina/
               │   └─ stamina_depleted.webm
               ├─ health/
               │   └─ health_low.webm
               └─ ui/
                   ├─ menu_click.webm
                   ├─ menu_navigate.webm
                   ├─ menu_select.webm
                   ├─ menu_hover.webm
                   └─ menu_back.webm

1. Backgrounds & Environments

Asset Name: intro_bg_loop.png
- Description: A seamless 1920×1080 loopable tile of a rain‐slicked concrete floor with neon pipes and drifting data‐line grid.
- File Format: PNG (plus normal/roughness if you want subtle 3D lighting on flat sprites, but PNG is usually enough).
- Folder: assets/visual/bg/intro/
- Visual Style Notes:
  - Base color: Obsidian (#0A0F12) with subtle film‐grain overlay.
  - Neon accents: teal/cyan reflections on puddles, flickering Hangul glyphs on pipes.
  - Animation: small “rain drip” loop in shader or flipbook.
Asset Name: mainmenu_foreground_overlay.png
- Description: A semi‐transparent obsidian vignette (20px “soft edge”) to darken screen edges, helping text/logo pop.
- File Format: PNG (alpha)
- Folder: assets/visual/overlays/
- Usage: Placed above intro_bg_loop to darken corners.

1.2 Dojang / Training Hall Background

Asset Name: dojang_floor_tex.png
- Description: 2048×2048 PBR‐style image of matte‐black tatami mats, with subtle water puddle normals (if you want dynamic reflections).
- File Format: PNG (or PNG + normal/roughness if desired)
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - Tileable so it can fill any resolution.
  - Slight neon cyan reflections at edges where wall meets floor.
Asset Name: dojang_wall_tex.png
- Description: 1024×1024 tile of corrugated metal with pipelines and emissive Hangul trigrams (☰, ☲, etc.) behind semi‐opaque panels.
- File Format: PNG (with separate emissive mask channel if you plan to animate neon flicker).
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - The emissive mask will let you “pulse” each trigram glyph via a simple shader or a flicker sprite.
Asset Name: dojang_wall_neon_flicker.png (optional flipbook)
- Description: A small flipbook (e.g. 4 frames at 256×256) showing a neon glyph flicker (cycle through 0%, 50%, 100% brightness).
- File Format: PNG sprite sheet
- Folder: assets/vfx/animations/
Asset Name: training_console_model.png
- Description: 512×512 stylized grayscale sprite of a holo‐console (flat sprite) with cyan emissive accents (for real‐time data display).
- File Format: PNG
- Folder: assets/visual/props/
- Notes: Use this as a static background element; you can overlay bitmaps of gauge bars, or simply let the console glow.
Asset Name: stance_pad_circle.png
- Description: 256×256 semi‐transparent PNG of a glowing floor circle. Pulses from 0 → 100% opacity in a 1s loop.
- File Format: PNG (alpha)
- Folder: assets/visual/props/

2. UI Icons & HUD Elements

2.1 Stance Icons

Each icon is a 64×64 px SVG (so it scales crisply). We’ll load them as textures in Pixi and tint/animate as needed.

icon_stance_defensive.svg
- Outline style in Slate Gray (#2E3538) when inactive.
- Filled with Teal Neon (#00FFC8) + soft glow when active.
icon_stance_balanced.svg
- Outline in Slate Gray; filled with Teal Neon on hover/active.
icon_stance_aggressive.svg
- Outline in Slate Gray; filled with Crimson (#FF0044) on “charged” or “ready” state, or Teal Neon when selected.
Folder: assets/ui/icons/stances/

2.2 Trigram Icons

File Names:

icon_trigram_1.svg
icon_trigram_2.svg
…
icon_trigram_8.svg
``$

\text{Each} \text{icon}: 48 \times 48 \text{px}, \text{dark} \text{background} (\text{Gunmetal} $#424A50`) with the trigram glyph in Teal Neon.
States:
- Inactive: no glow, just basic fill.
- Active: slight outer glow + subtle 1.1× scale “pulse.”
- Hover: 1.05× scale + quick glow (0.2 s).
Folder: assets/ui/icons/trigrams/

2.3 HUD Bars & Overlays

hud_health_bar.png (800×32 px PNG)
- 10 segmented blocks. Each filled segment is Cyan Glow (#1BE7FF); empty is Slate Gray.
- Folder: assets/ui/hud/
hud_pain_bar.png (800×16 px PNG)
- 10 segments. Filled segments are Crimson (#FF0044); empty Slate Gray.
- Folder: assets/ui/hud/
ui_button_start_idle.png & ui_button_start_hover.png (256×64 px each)
- Idle: Slate Gray panel with “▶ Start Combat” in Hangul+English.
- Hover: Underline in Teal Neon + icon (“▶”) glows.
- Folder: assets/ui/buttons/
ui_panel_slate.png (1024×512 px)
- A semi-opaque Slate Gray panel (70% opacity) with a subtle noise texture.
- Folder: assets/ui/panels/
tooltip_arrow.png (32×32 px PNG)
- Small triangle arrow in Cyan Glow for tooltips.
- Folder: assets/ui/tooltips/

3. Technique Animations (AnimatedSprite Sprite Sheets)

Any time you see code like:

await Assets.load("path/to/spritesheet.json");
const frames = [];
for (let i = 0; i < N; i++) {
  frames.push(Texture.from(`frame${i}.png`));
}
const anim = new AnimatedSprite(frames);

…you need a sprite sheet JSON + corresponding PNG atlas for each “technique.” Below is a minimal required set of technique animations:

3.1 Light Strike Animation (All Archetypes)

Sprite Sheet JSON: strike_light_spritesheet.json
Texture Atlas: strike_light_spritesheet.png (e.g., 512×512 containing all 6 frames laid out in a grid).
Frame Count: 6 frames, each ~128×256 (portrait orientation).
Animation Speed: 0.6 (adjust per archetype).
Visual Content: Character winds up → quick punch/kick → recoil. No background in atlas (transparent).
Folder: assets/characters/animations/techniques/light/

3.2 Medium Strike Animation

Sprite Sheet JSON: strike_medium_spritesheet.json
Texture Atlas: strike_medium_spritesheet.png (6–8 frames, ~128×256 each).
Description: More wind-up, more impact frames, a small dust puff frame integrated (see VFX).
Folder: assets/characters/animations/techniques/medium/

3.3 Heavy Strike Animation

Sprite Sheet JSON: strike_heavy_spritesheet.json
Texture Atlas: strike_heavy_spritesheet.png (8 frames, ~256×256 each).
Description: Big wind-up, slow-mo pause on impact, splash of embedded VFX dust/blood.
Folder: assets/characters/animations/techniques/heavy/

3.4 Critical Strike / Finisher Animation

Sprite Sheet JSON: strike_critical_spritesheet.json
Texture Atlas: strike_critical_spritesheet.png (10–12 frames, ~256×256).
Description: Slow-mo bone-breaking blow → flash frame → slowdown.
Folder: assets/characters/animations/techniques/critical/

3.5 Dodge / Evade Animation

Sprite Sheet JSON: dodge_spritesheet.json
Texture Atlas: dodge_spritesheet.png (4–6 frames, ~128×256).
Description: Quick sidestep/backflip frames, subtle afterimage.
Folder: assets/characters/animations/techniques/dodge/

3.6 Block / Parry Animation

Sprite Sheet JSON: block_spritesheet.json
Texture Atlas: block_spritesheet.png (5 frames, ~128×256).
Description: Character raises arm/weapon to block → recoil if successful.
Folder: assets/characters/animations/techniques/block/

3.7 Hit Reaction Animation

Sprite Sheet JSON: hit_reaction_spritesheet.json
Texture Atlas: hit_reaction_spritesheet.png (4 frames, ~128×256).
Description: Character flinches backwards, tinted red on final frame.
Folder: assets/characters/animations/techniques/hit/

3.8 Finisher Sequence (All Archetypes)

Sprite Sheet JSON: finisher_musa_spritesheet.json, finisher_amsalja_spritesheet.json, etc.
Texture Atlas: finisher_musa_spritesheet.png (12 frames, ~256×256), etc.
Description: A multi-stage “cinematic” finisher (pause → bone crushing → slow fade).
Folder: assets/characters/animations/finisher/

4. Pixi.js Dependencies & Modules Needed

import {
  Application,
  TickerPlugin, // core ticker
  ResizePlugin, // auto resizes to window
  Assets, // for loading JSON/PNG atlases
  Texture,
  Sprite,
  AnimatedSprite,
  Container,
  TilingSprite, // if you want parallax/tiled backgrounds
  Loader, // older API if you prefer Loader instead of Assets
} from "pixi.js";

Application (from app/Application.mjs)
- Creates the Pixi canvas, WebGL context, stage, etc.
TickerPlugin & ResizePlugin
- Ensures your app’s ticker (main game loop) and auto-resize functionality.

Assets (from assets/Assets.mjs)

The new recommended loader for JSON sprite sheets, PNGs, audio, etc.

Example:

await Assets.load(
  "assets/characters/animations/techniques/light/strike_light_spritesheet.json"
);

Texture (from rendering/texture/Texture.mjs)
- Create textures from loaded assets:
```
const frameTex = Texture.from("strike_light_000.png");
```
Sprite & AnimatedSprite (from scene/sprite/Sprite.mjs & scene/sprite-animated/AnimatedSprite.mjs)
- Sprite for static images (UI icons, backgrounds).
- AnimatedSprite for flipbook animations (techniques, VFX).
Container (from scene/container/Container.mjs)
- Use a parent Container for grouping layers:
  - backgroundContainer
  - characterContainer
  - uiContainer
  - vfxContainer
TilingSprite (from scene/sprite-tiling/TilingSprite.mjs)
- If you want to scroll/loop the intro_bg_loop.png or tile dojang_floor_tex.png seamlessly across a larger stage.
Loader (from assets/loader/Loader.mjs)
- If you prefer the older PIXI.Loader API to Assets. Both are possible; Assets is recommended for newer Pixi versions.
Filter / BlurFilter / DisplacementFilter (from filters/defaults/*)
- Useful for adding real-time blur afterimages (for dodge), screen shakes, or ripples when powering up Ki (ki_charge).

5. Directory Structure & Final Checklist

Below is a consolidated folder structure showing where each of the above assets live. This is what your repo (or build pipeline) needs before you start coding the Pixi setup:

/assets
├─ characters/
│  ├─ animations/
│  │   ├─ techniques/
│  │   │   ├─ light/
│  │   │   │   ├─ strike_light_spritesheet.json
│  │   │   │   └─ strike_light_spritesheet.png
│  │   │   ├─ medium/
│  │   │   │   ├─ strike_medium_spritesheet.json
│  │   │   │   └─ strike_medium_spritesheet.png
│  │   │   ├─ heavy/
│  │   │   │   ├─ strike_heavy_spritesheet.json
│  │   │   │   └─ strike_heavy_spritesheet.png
│  │   │   ├─ critical/
│  │   │   │   ├─ strike_critical_spritesheet.json
│  │   │   │   └─ strike_critical_spritesheet.png
│  │   │   ├─ dodge/
│  │   │   │   ├─ dodge_spritesheet.json
│  │   │   │   └─ dodge_spritesheet.png
│  │   │   ├─ block/
│  │   │   │   ├─ block_spritesheet.json
│  │   │   │   └─ block_spritesheet.png
│  │   │   └─ hit/
│  │   │       ├─ hit_reaction_spritesheet.json
│  │   │       └─ hit_reaction_spritesheet.png
│  │   └─ finisher/
│  │       ├─ musa_finisher_spritesheet.json
│  │       └─ musa_finisher_spritesheet.png
│  │       ├─ amsalja_finisher_spritesheet.json
│  │       └─ amsalja_finisher_spritesheet.png
│  │       └─ … (one per archetype)
│  └─ portraits/
│      ├─ portrait_musa.png
│      ├─ portrait_amsalja.png
│      └─ … (other archetypes)
│
├─ fonts/
│  ├─ BlackTrigram-Hangul.woff2
│  ├─ NotoSansKR-Regular.woff2
│  └─ Roboto-Regular.woff2
│
├─ i18n/
│  ├─ ko.json
│  └─ en.json
│
├─ props/
│  ├─ training_console_model.png
│  ├─ stance_pad_circle.png
│  └─ dummy_target_overlay.svg
│
├─ shaders/
│  ├─ rim_light.shader
│  ├─ blood_decal.shader
│  └─ neon_flicker.shader
│
├─ ui/
│  ├─ buttons/
│  │   ├─ ui_button_start_idle.png
│  │   └─ ui_button_start_hover.png
│  ├─ icons/
│  │   ├─ stances/
│  │   │   ├─ icon_stance_defensive.svg
│  │   │   ├─ icon_stance_balanced.svg
│  │   │   └─ icon_stance_aggressive.svg
│  │   ├─ trigrams/
│  │   │   ├─ icon_trigram_1.svg
│  │   │   ├─ icon_trigram_2.svg
│  │   │   └─ … up to icon_trigram_8.svg
│  │   └─ tooltip_arrow.png
│  └─ hud/
│      ├─ hud_health_bar.png
│      └─ hud_pain_bar.png
│
├─ vfx/
│  ├─ animations/
│  │   ├─ anim_logo_pulse.json
│  │   ├─ anim_menu_slide_0.png … anim_menu_slide_7.png
│  │   ├─ anim_strike_impact_0.png … anim_strike_impact_15.png
│  │   └─ anim_finisher_musa_0.png … anim_finisher_musa_11.png
│  ├─ particles/
│  │   ├─ vfx_dust_puff.png
│  │   ├─ vfx_blood_splatter.png
│  │   └─ confetti_sprites.png
│  └─ shaders/
│      ├─ vfx_impact_ring.png
│      ├─ vfx_neon_glow.png
│      └─ vfx_critical_flash.png
│
├─ visual/
│  ├─ bg/
│  │   ├─ intro/
│  │   │   ├─ intro_bg_loop.png
│  │   │   └─ mainmenu_foreground_overlay.png
│  │   └─ dojang/
│  │       ├─ dojang_floor_tex.png
│  │       └─ dojang_wall_tex.png
│  └─ overlays/
│      ├─ vital_region_head.png
│      ├─ vital_region_neck.png
│      ├─ vital_region_torso.png
│      ├─ vital_region_arms.png
│      ├─ vital_region_chest.png
│      └─ vital_region_legs.png
│
└─ public/
   └─ assets/
       └─ audio/
           ├─ music/
           │   ├─ intro_theme.webm
           │   ├─ combat_theme.webm
           │   ├─ combat_theme_geon.webm
           │   ├─ training_theme.webm
           │   ├─ meditation_theme.webm
           │   ├─ victory_theme.webm
           │   ├─ underground_rave_theme.webm
           │   └─ ambient_loop.webm
           └─ sfx/
               ├─ ambient/
               │   ├─ dojang_ambience.webm
               │   ├─ wind_effect.webm
               │   └─ dojo_crowd.webm
               ├─ attacks/
               │   ├─ attack_punch_light.webm
               │   ├─ attack_punch_medium.webm
               │   ├─ attack_kick_heavy.webm
               │   ├─ attack_light.webm
               │   ├─ attack_medium.webm
               │   ├─ attack_critical.webm
               │   ├─ attack_special_geon.webm
               │   ├─ dodge.webm
               │   ├─ block_success.webm
               │   ├─ block_break.webm
               │   └─ perfect_strike.webm
               ├─ hit/
               │   ├─ hit_light.webm
               │   ├─ hit_medium.webm
               │   ├─ hit_heavy.webm
               │   ├─ hit_critical.webm
               │   ├─ hit_flesh.webm
               │   └─ hit_block.webm
               ├─ combo/
               │   ├─ combo_buildup.webm
               │   ├─ combo_finish.webm
               │   └─ energy_pulse.webm
               ├─ match/
               │   ├─ match_start.webm
               │   ├─ countdown.webm
               │   ├─ match_end.webm
               │   ├─ victory.webm
               │   └─ defeat.webm
               ├─ movement/
               │   ├─ footstep.webm
               │   └─ stance_change.webm
               ├─ ki/
               │   ├─ ki_charge.webm
               │   └─ ki_release.webm
               ├─ stamina/
               │   └─ stamina_depleted.webm
               ├─ health/
               │   └─ health_low.webm
               └─ ui/
                   ├─ menu_click.webm
                   ├─ menu_navigate.webm
                   ├─ menu_select.webm
                   ├─ menu_hover.webm
                   └─ menu_back.webm

1. Backgrounds & Environments

Asset Name: intro_bg_loop.png
- Description: A seamless 1920×1080 loopable tile of a rain‐slicked concrete floor with neon pipes and drifting data‐line grid.
- File Format: PNG (plus normal/roughness if you want subtle 3D lighting on flat sprites, but PNG is usually enough).
- Folder: assets/visual/bg/intro/
- Visual Style Notes:
  - Base color: Obsidian (#0A0F12) with subtle film‐grain overlay.
  - Neon accents: teal/cyan reflections on puddles, flickering Hangul glyphs on pipes.
  - Animation: small “rain drip” loop in shader or flipbook.
Asset Name: mainmenu_foreground_overlay.png
- Description: A semi‐transparent obsidian vignette (20px “soft edge”) to darken screen edges, helping text/logo pop.
- File Format: PNG (alpha)
- Folder: assets/visual/overlays/
- Usage: Placed above intro_bg_loop to darken corners.

1.2 Dojang / Training Hall Background

Asset Name: dojang_floor_tex.png
- Description: 2048×2048 PBR‐style image of matte‐black tatami mats, with subtle water puddle normals (if you want dynamic reflections).
- File Format: PNG (or PNG + normal/roughness if desired)
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - Tileable so it can fill any resolution.
  - Slight neon cyan reflections at edges where wall meets floor.
Asset Name: dojang_wall_tex.png
- Description: 1024×1024 tile of corrugated metal with pipelines and emissive Hangul trigrams (☰, ☲, etc.) behind semi‐opaque panels.
- File Format: PNG (with separate emissive mask channel if you plan to animate neon flicker).
- Folder: assets/visual/bg/dojang/
- Style Notes:
  - The emissive mask will let you “pulse” each trigram glyph via a simple shader or a flicker sprite.
Asset Name: dojang_wall_neon_flicker.png (optional flipbook)
- Description: A small flipbook (e.g. 4 frames at 256×256) showing a neon glyph flicker (cycle through 0%, 50%, 100% brightness).
- File Format: PNG sprite sheet
- Folder: assets/vfx/animations/
Asset Name: training_console_model.png
- Description: 512×512 stylized grayscale sprite of a holo‐console (flat sprite) with cyan emissive accents (for real‐time data display).
- File Format: PNG