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Is it not the case that the top end 3D software packages all, also have equally or more complex shader systems than Poser in fact? 

I can't say for all those other titles, but Maya at least, uses a node-based shader system that makes even the most complicated poser setup look like kindergarden homework. I actually failed shading & lighting my first time through, due to how complex Maya's shading is, and wound up having to go buy my own book on the subject just to get through the course the 2nd time.

 

~Shane