materialsub.cfg

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cfg/materialsub.cfg is a KeyValues file which, when the -replacematerials parameter is used by VBSP, causes the materials defined in the VMF to be swapped out in the compiled BSP.

Confirm:Does this occur before or after material map compile flags are parsed?

Code:Keyvalue handling occurs in materialsub.cpp.

Syntax

"MaterialReplacements"
{
	"AllMaps"
	{
		"material_in_vmf"	"material_in_bsp"
	}
	"mapname"
	{
		"material_in_vmf"	"material_in_bsp"
	}
}

Confirm:Verify this is accurate; it was determined by reading VBSP source code.