项目作者： Kevinsomnia
项目描述 ：
A Unity project that experiments with raytracing and compute shaders.
高级语言： HLSL
项目地址: git://github.com/Kevinsomnia/Raytracing.git
Raytracing
This is a complete Unity project that implements raytracing using a compute shader. Runs at about 100-150 FPS (High Quality enabled) and 200-250 FPS (High Quality disabled) on a NVIDIA GTX 1060 (3 GB) @ 1080p with the included scene.
A large portion of the code is based off of the 3-part GPU Ray Tracing blog series, which can be found here.
The blog post is great for learning how compute shaders work, and the fundamentals of raytracing.
Pre-requisites
- Developed on Unity 2019.2.0f1. May still work with earlier versions of Unity.
- A GPU with Shader Model 5.0 support.
Benefits over traditional, deferred rendering
- Extremely accurate lighting.
- Nearly infinite shadow distance and precision (no shadowmaps).
- Pixel perfect reflections on every surface.
Drawbacks
- Very expensive to render, especially on old hardware.
- Performance degrades with more objects/lights in the scene.
- Rendering geometry more complex than primitive shapes is unrealistic.
- Everything is untextured due to the lack of UV maps.
- Diffuse reflections requires the scene to be static to avoid smearing artifacts. The resulting image is also noisy when moving the camera around (due to random sampling).
