UnitySSPathTracingURP

Screen Space Path Tracing for Unity's URP (Universal Render Pipeline).

Please read the Documentation and Requirements before using this repository.

Screenshots

(BoxScene + Reflection Probe Fallback)

(Not Included)

Original Cornell Box

Classroom by Christophe Seux (CC0)

Stormtrooper Star Wars VII by ScottGraham (CC-BY-3.0)

Refraction (Lit by emission)

Documentation

Here.

Requirements

• Unity 2022.2 and URP 14 (enable TAA is recommended)
• Deferred rendering path (OpenGL will always in Forward path)
• Forward rendering path (need extra setup)
• Multiple Render Targets support (at least OpenGL ES 3.0 or equivalent)
• Lowering down the Render Scale (e.g. "0.5") on mobile devices and use upscaler (e.g. FSR 1.0) to reduce performance cost.
• Use "Refraction Lit" shader graph to render screen space path traced refraction.

License

MIT

References

Three-Eyed-Games GPU-Ray-Tracing-in-Unity

Introduction to Path Tracing - Marc Sunet

Please see PathTracing.hlsl.