rjjack,

I do not understand what you're showing.

You show two Poser Surface nodes in the same mat room. Impossible.

What am I to understand from this?

The one on the left is an example of a bad shader. You have a very bright color in both diffuse and specular, and the maximum specular value + diffuse value is way over 1. This is your typical nonsense shader made by Poser users and you get exactly what you asked for there.

If you think the appearance is a bug, it isn't. That's what it is supposed to look like if you program it to go nuts like that.

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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)