Thanks for all of the information, everyone.  Interesting.  Now I understand why everyone has been posting about "linear" and "non-linear".  :lol:  I didn't quite get it.

Does anyone understand how the node-based gamma correction in BB's satin/silk texture works?  I'm finding that the silk materials for which I've adapted his shader are looking better than other materials, under almost all conditions.  If the same method could be integrated into other shaders, I rather wonder if that might help some of them. 

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.