RTX Character Rendering Sample User Guide
December 16, 2025 · View on GitHub
The RTX Character Rendering Sample provides an example of using the RTX Character Rendering libraries for hair and skin. It also provides a GUI to easily interact with the sample, including changing materials in real-time to demonstrate rendering details for skin and hair.
The GUI can be opened or closed using the ESC key on the keyboard.
Generic
| Name | Description |
|---|---|
| Camera Speed | The speed of camera |
| Lock Camera | Lock the camera or allow moving/rotation |
| Scene | Select the render scene |
| Refresh Scene | Reload the current scene |
| Back Face Culling | Enable/Disable backface culling |
| Enable Soft Shadows | Enable/Disable soft shadows from punctual lights |
| Transmission | Allow rays to penetrate the surface and sample on the other side as refraction ray |
| Recompile Shader | Recompile shaders in real time; any compilation errors will be displayed in the console window |
| Capture Screenshot | Capture a screenshot of the current render result and save it as a .png file in the bin/screenshots/ folder |
DLFG
DLFG (DLSS Frame Generation) is supported in our sample on RTX 40 and 50 series GPUs.
RTX 40 series: Supports single-frame generation.RTX 50 series: Supports up to 3 generated frames (4× DLFG) for higher frame rates.
Reflex
Reflex is supported in our sample to reduce system latency and improve responsiveness.
Low Latency: Minimizes input lag by syncing CPU and GPU work.Low Latency + Boost: Includes Low Latency plus keeps GPU at high clocks to avoid slowdowns when CPU-limited.
Path Tracing
| Name | Description |
|---|---|
| Enable Random | Enable random light and BSDF sampling |
| Bounces | Maximum number of bounces allowed for each path |
| Exposure Adjustment | Post-processing exposure adjustment |
| Debug Output | Show Debug Views |
Denoiser
Denoiser selection: we currently support DLSS-RR, NRD, and reference mode.
DLSS-RR has following 5 quality modes:
DLAA: Full-screen denoiser. Ultimate Quality.Quality: Best quality with some performance cost.Balance: Best balance mode between quality and performance.Performance: Better performance, could have minor artifacts or blurries.UltraPerformance: Best performance, but could cause significant artifacts and blurries.
We also provide NRD as an alternative denoiser, compatible with any ray tracing-capable GPU. For more details, check the NRD Guide
Upscaler
Upscaler Selection: When using NRD or disabling the denoiser, we currently support DLSS-SR and TAA as upscalers.
Similar to DLSS-RR, DLSS-SR also has 5 quality modes:
DLAA: Full-screen denoiser. Ultimate Quality.Quality: Best quality with some performance cost.Balance: Best balance mode between quality and performance.Performance: Better performance, could have minor artifacts or blurries.UltraPerformance: Best performance, but could cause significant artifacts and blurries.
Lighting
| Name | Description |
|---|---|
| Enable Sky | Enable skybox |
| Sky Type | Constant/Procedural/EnvironmentMap |
| Environment Map | Choose the environment map from assets folder |
| Environment Light Intensity | The scalar for environment map lighting |
| Enable Emissives | Enable the emissive surfaces |
| Show Emissive Surfaces | Show the emissive surfaces. If disabled, the emissives will still be calculated, but the surfaces will be invisible |
| Enable Lighting | Enable/Disable all lights |
| Enable Direct Lighting | Enable the direct lighting |
| Enable Indirect Lighting | Enable the indirect lighting |
Hair
See explanations of parameters in RTX Character Rendering Hair Guide, Step 2.
To use the GUI parameters, tick "Enable Hair Material Override".
Subsurface Scattering
See explanations of parameters in RTX Character Rendering SSS Guide, Step 2.
To use the GUI parameters, tick "Enable Hair Material Override".
Animation
| Name | Description |
|---|---|
| Enable Animation | Globally enable animation. |
| Speed | Animation playback speed, in seconds per frame. |
| Enable Animation Smoothing | Smooth the transition of the last frame to avoid sudden jumps back to the first frame. |
| Smoothing Factor | Controls the amount of smoothing applied to the animation. |
| Enable Animation Debugging | Enable debugging for animation playback. |
| Animation Keyframe Index Override | Render the animation at a specific keyframe index. |
| Animation Keyframe Weight Override | Render the animation between keyframe N and N+1 with a specific interpolation weight. |
Tone mapping
| Name | Description |
|---|---|
| Operator | Tonemapping operator, support Reinhard and Linear |
| Clamp | Clamp final output color to 0-1 |
Cmdline Options
Generic
-d3d12or-dx12: Use DirectX 12 as the graphics API (default). DirectX 11 is not supported in this sample.-vkor-vulkan: Use Vulkan as the graphics API.-borderless: Create a window without borders.-fullscreen: Launch in fullscreen mode.-1080p,-1440p,-2160p: Set the initial resolution (1080p, 2K, or 4K).-scene: Specify the scene to load in the sample.-screenshot: Specify the screenshot filename.-enableSky: Enable or disable the skybox.
Denoiser
-denoiser: Select denoiser mode: None(0), NRD(1), or DLSS-RR(2).-nrdMode: Select NRD mode: Reblur(0) or Relax(1).-accumulate: Enable reference accumulation mode.
Hair
-hairBsdf: Select hair BSDF: Chiang BSDF(0) or FarField BSDF(1).-hairColorMode: Select hair color mode: color(0) or physics(1).-enableHairOverride: Enable hair override from the GUI.-hairRadiusScale: Scale factor for hair radius.-hairTessellationType: Select hair geometry tessellation: Polytube(0), DOTS(1), or LSS(2).
Animation
-enableAnimation: Enable morph target animation.-animationKeyframeIndex: Debugging option. Render the animation at a specific keyframe index.-animationKeyframeWeight: Debugging option. Render the animation between keyframe N and N+1 with a specific interpolation weight.