M2/Rendering

Blending Modes

Wrath of the Lich King and Cataclysm do not use separate alpha blending. Later expansion clients likely do use separate alpha blending.

Blend_BlendAdd was added after Cataclysm.

	Mode	Src Color	Dest Color	Src Alpha	Dest Alpha
0	Blend_Opaque	ONE	ZERO	ONE	ZERO
1	Blend_AlphaKey	ONE	ZERO	ONE	ZERO
2	Blend_Alpha	SRC_ALPHA	ONE_MINUS_SRC_ALPHA	ONE	ONE_MINUS_SRC_ALPHA
3	Blend_Add	SRC_ALPHA	ONE	ZERO	ONE
4	Blend_Mod	DST_COLOR	ZERO	?	ZERO
5	Blend_Mod2x	DST_COLOR	SRC_COLOR	?	SRC_ALPHA
6	Blend_ModAdd	DST_COLOR	ONE	?	ONE
7	Blend_InvSrcAlphaAdd	ONE_MINUS_SRC_ALPHA	ONE	ONE_MINUS_SRC_ALPHA	ONE
8	Blend_InvSrcAlphaOpaque	ONE_MINUS_SRC_ALPHA	ZERO	ONE_MINUS_SRC_ALPHA	ZERO
9	Blend_SrcAlphaOpaque	SRC_ALPHA	ZERO	-	-
10	Blend_NoAlphaAdd	ONE	ONE	-	-
11	Blend_ConstantAlpha	CONSTANT_ALPHA	ONE_MINUS_CONSTANT_ALPHA	-	-
12	Blend_Screen	ONE_MINUS_DST_COLOR	ONE	-	-
13	Blend_BlendAdd	ONE	ONE_MINUS_SRC_ALPHA	-	-