PBR-2-Source
PBR-2-Source is a tool written in 
Python by koerismo that is used to port PBR materials to any 
Source game, even those without support for a PBR shader. When converting to standard shaders, it uses special algorithms to bake different texture maps into one diffuse texture. When converting to use with a PBR shader, it takes different texture maps and makes an MRAO map. This program automatically creates a fully functional VMT file, with optional reflections, and also can flip the Y of a normal map if it was created in a program using 
Maya's format instead of 
3DS Max's format.
See also
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