Well I only made the black part 1/10th inch thick and we're looking straight at it, and I didn't put any specular on the black. Every image I ever saw of stained glass, the black was flat black.

How's this? I increased the displacement and added some specular.

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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)