Quote - Really, there is absolutely nothing wrong with Poser's lights. It is the terrible, mindless abuse of shaders that causes the problems. There is a very limited purpose to the translucency parameter and it has been horribly abused for years.

This makes a very strong case for a thorough study of / manual for / understanding of shaders before going into the material room and an equally strong case against just mucking around stringing nodes together until the desired effect is ostensibly achieved. That "mucking around" is the prevalent approach, and this is why we get such odd effects once we apply our own lights or try to get rid of nostril glow or whatever.

I have been pondering what the best approach would be to get the Poser Content Developer to embrace this concept and clamour for a definitive work to teach these concepts, but then, no Nodes For Dummies hue-and-cry appears to be forthcoming. As long as the concept of "rubbish shader" is not even considered by developers as something significant enough to avoid, we will continue to see this sort of issue arise.

Mind you: I'm not purer than the driven snow in that regard. I've unwittingly released some rubbish into the material-room wild myself. But, at least I'm aware that I have.

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks