Shader帮助文档集合

• 预定义宏
  https://docs.unity3d.com/Manual/SL-BuiltinMacros.html

• 工具方法
  https://docs.unity3d.com/Manual/SL-BuiltinFunctions.html

• 内置变量
  https://docs.unity3d.com/Manual/SL-UnityShaderVariables.html

• 语义

https://docs.unity3d.com/Manual/SL-ShaderSemantics.html

• Queue

https://docs.unity3d.com/Manual/SL-SubShaderTags.html

• RenderType

https://docs.unity3d.com/Manual/SL-ShaderReplacement.html