The point at which you guys are at here is where I was a while back, quite a few times. My expectations were occasionally violated - I see stuff I don't expect. My mental mental model suggests what should happen instead, and my model is wrong, but I persist in believing it is the software that is wrong.

I have always found success in correcting my mental model, my understanding of the situation. Usually this requires getting back to basics  - and NOT rendering complicated multi-light scenarios with a high polygon figure.

The most important tools we have in Poser are the primitives. No joke. Not for creating scenes, but for becoming an expert at shaders and lighting, the primitives are worth $1000, yet we get them for free.

Let me show you how I understand what happens in a pair of lips, with the kind of lighting you're using.

This will take a few postings, and I'm doing the work in real time.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)