ShaderLab

ShaderLab is a declarative language that you use in shader source files. It uses a nested-braces syntax to describe a Shader object.

There are many things that you can define in ShaderLab, but the most common are:

• Defining the overall structure of the Shader object. See ShaderLab: creating a Shader, ShaderLab: creating a SubShader, and ShaderLab: creating a Pass.
• Using code blocks to add shader programs written in HLSL. See ShaderLab: adding shader programs.
• Using commands to set the render state of the GPU before it executes a shader program, or to perform an operation involving another Pass. See ShaderLab: commands.
• Exposing properties from your shader code so you can edit them in the material Inspector and save as part of a material asset. See ShaderLab: defining material properties.
• Defining fallback behavior for when Unity cannot run any of the SubShaders with a Shader object on the current hardware. See ShaderLab: assigning a fallback.