penumbra23 / pbr-shaders

Standard PBR shader written in Unity Cg

PBR-Shaders

Intro

PBR-Shaders is a set of shader programs written in Cg to demonstrate how to implement a PBR roughness/metallic workflow for your graphical application.

The physical model for the BRDF consists of:

• Lambert - diffuse component
• Cook-Torrance - specular component

The lighting models are:

• Directional light
• Point light
• Spot light
• Image-based lighting using environment maps

Samples

Structure

The Assets folder contains the shader library, textures, materials and demo scenes.

Folder	Description
Shaders	PBRLib.cginc & PBRShader.shader are both the PBR function library and main PBR shader program
Materials	Sample materials such as gold, rough stone, slippery rock, walls, etc.
Textures	Data for the roughness/metallic workflow, albedo, occlusion and environment maps
Scenes	Just demo scenes

Credits

PBR textures:

• cc0
• FreePBR
• Poliigon (here I've only used the free ones, but it's definitely worth getting a subscription)

Environment maps:

• Texturify
• HDRI Hub

License

MIT