Lighting Models

The lighting models are used to describe how the surface of an object affects and interacts with light.

The currently supported lighting models are as follows.

Light Model Name	Description
standard	PBR lighting, supporting GGX BRDF distribution of isotropic and anisotropic lighting, supporting convoluted ambient lighting.
toon	Simple cartoon lighting, step-like lighting effect.

The built-in shader functions related to the lighting models are placed in the internal/chunks/lighting-models/includes/ folder, During the Surface Shader Assembly phase, using include to import the corresponding code, the lighting calculation can be completed.