URPFog

Simple Post Processed Raymarched Fog in Unity's Universal Render Pipeline (URP)

• Scene:
• Assets/Scenes/ExampleScene.unity
• Shaders:
• Assets/URPFog/Shaders/Fog.hlsl
• Assets/URPFog/Shaders/DistanceFog.shader
• Render Setting and Material:
• Assets/URPFog/DistanceFo

Note: The Render Pass Feature assignment seems to disappear occasionally. If you are not seeing fog, make sure Assets/URPFog/DistanceFog/URPVolumeFogRenderer RenderFeature has a feature created from 'VolumeFog`

It is not intended as a production-ready volume fog solution, but as straightforward example of:

• Extending the ScriptableRendererFeature.
• Accessing Lights, Depth and Shadow
• Creating and Accessing 3D Textures

In the future I'd like to add:

• Dynamic compute shader generation of the 3D Noise texture based on user settings (changes to noise params, texture dimensions, etc.)
• Better (but still simple) fog implementation with artist friendly controls
• Fade to Sky color
• Optimization of the March loop, understanding how and when loops can be unrolled.

This project is based on work from these other GitHub projects:

IQ's Fog Article and Shader Toy shaders

Simple Mad's VolumetricLights

Unity's UniversalRenderingExamples

Volumetric Textures generated with TextureGenerator