Default pass startup state shader configurations

The state shaders are not necessarily needed in your shading pipeline, as the engine has default implemented behaviours.

Here are the default behaviours applied at the startup of each rendering pass in the engine. Blended materials passes startup state is identical to master passes startup state:

Pass ID	Blending mode	Depth mode
RED::MTL_PRELIT	No blending: ONE * SRC_COLOR + ZERO * DEST_COLOR	Depth test = ON Depth write = ON Depth equation = LEQUAL
RED::MTL_LIT	Additive blending: ONE * SRC_COLOR + ONE * DEST_COLOR	Depth test = ON Depth write = OFF Depth equation = LEQUAL
RED::MTL_POSTLIT	Additive blending: ONE * SRC_COLOR + ONE * DEST_COLOR	Depth test = ON Depth write = OFF Depth equation = LEQUAL
RED::MTL_RAYTRACE	N/A	N/A
RED::MTL_INDIRECT_PRELIT	No blending: ONE * SRC_COLOR + ZERO * DEST_COLOR	N/A
RED::MTL_INDIRECT_LIT	Additive blending: ONE * SRC_COLOR + ONE * DEST_COLOR	N/A
RED::MTL_INDIRECT_POSTLIT	Additive blending: ONE * SRC_COLOR + ONE * DEST_COLOR	N/A

When handling true transparent objects (RED::StateShader::SORTED_TRANSPARENCY setup) all depth functions must be replaced by EQUAL instead of LEQUAL. All other state default values are given by the RED::StateShader default class creation values and do not rely on the current pass being rendered.

Configuring a render shader using a state shader

Defining shader programs by hardware platform next page