fixed function is how blitz 3d materials work, with texture layers, blendmodes etc. GPU shader programs have replaced those and old school blendmodes etc have to be emulated in simple programs.
Quite tricky for artists to get to grips with since just creating a shader for applying a texture or color requires basic programming knowledge.
Quite tricky for artists to get to grips with since just creating a shader for applying a texture or color requires basic programming knowledge.