Quote -
Also, we mustn't forget the power of encapsulation, one of the basic tenets of modern software development. Encapsulation used to be called "data hiding", but it's much more than that now. It means to exclude the details, so much so that they are actually cannot be viewed anymore. For example, you understand this:

ior = PM(1.54, "IOR")
s.Reflection_Value = Fresnel(ior)

will generate a bunch of nodes. (15 if I recall correctly). Were you to look at those nodes (the details) you'd have quite a time of understanding that it was a Fresnel reflection effect.

But the script fragment is utterly clear.

Quote - I meant to type TrueFresnel in the last post. Oh well. Fresnel, of course, is a node - a crappy one I never use anymore.

I haven't given up yet although my brains are pretty much fried as a result of staring at your VSS skin shader nodes and your nylon material nodes...I need a break, but I'll be back.