ValveSoftware/source-sdk-2013 — pull request #200 by Biohazard90 (2013-09-30 13:20:53+00:00)
Title: Fixed vbsp not loading game shader libraries

VBsp is not loading game shader libraries by default which results in custom lightmapped shaders to be unlit in-game. It can be fixed by calling IMaterialSystem::ModInit right after VBsp initialized the material system.