The default configuration (config.py:cxr_shader_params) is built to work with the Principled BSDF shader.
In the material properties you will find options for the VTF format and VMT properties. The supported VTF formats are: bgr888, abgr888, dxt1 & dxt5.
NOTE: Normal maps must be in OpenGL (correct) format.
Live Recompile: You can recompile the material from the properties panel, and to update it in-game you can run in the console:
exec convexer cxr_reloadThese configuration files are generated for you.
correct: OpenGL's coordinate space follows real world physics observations.