Renderman.

It seems that if I want to follow industry standards, I have not too much to choose from. It is either Renderman or Mental, or Blender, or something like Cg or alike. Yes, I know that they are "of different type", but my problem is to choose something distant just to set the direction. I have no preferences, and so after talk with one guy, the Renderman was chosen. Yet I have no idea about reyes and other renderman-specific things, but I will find it out.