Ah! Thanks face_off and ynsaen! I decided to do a bit of RTFM. Unfortunately, as usual, the P5 documentation is nothing more than a tease, hinting at answers but failing to provide them or a rational way of deducing them short of tedious trial and error. Can someone tell me what the value the render option "minimum displacement bounds" actually does. The manual implies it's measured in pixels, but that seems illogical. Mine seems to default to 0.000. I have "use displacement maps" checked (having tried disconnecting then reconnecting all the granite nodes from the displacement option in the root node for V3's material zones. Doing a test render now (tap foot. look at watch. repeat ad nauseam) with min displace bound set to 1.000! Will muck with shadow bias next render if that doesn't help. I already have my scene scaled up 10 times. I'll try 100 after that, lol. As far as the yellow tinge to the skin tones goes, I'll try setting the lights back to colourless greys.

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