PBR-2-Source
PBR-2-Source is a tool written in 
Python by koerismo that can be used to port PBR materials to a wide variety of 
Source games, even those without PBR shader support. When converting to standard shaders, it uses several algorithms to approximate roughness and metalness with a combination of Phong and $envmap reflections. When converting for use with a PBR shader, it simply combines the provided textures. On export, a VMT file will be created that defines the material for use in-game.
Supported games
This is the official list of games supported by PBR-2-Source. If a game is not listed here, it may still work, but the program will not be able to account for any game-specific caveats.
Half-Life 2: Episode Two (Requires testing)
Portal (Requires testing)
Team Fortress 2 (Requires testing)
Portal 2
Alien Swarm (Requires testing)
Garry's Mod
Counter-Strike: Global Offensive
Strata Source
See also
External links
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