Sure! The Scatter Volume node shouldn't be there - I used it because I'd seen a skin shader with it from years ago, and started adding more nodes to get the look I wanted. Turns out the node wasn't even being rendered with Branched Path Tracing off to begin with, for some reason - so the rest of the shader was responsible for the entire look I wanted, and the Scatter Volume was causing all that weird redness/blackness with Branched Path Tracing. I just deleted that node and everything worked.

More details, and some tips for the SubsurfaceScattering node, on the thread I was given this answer: https://forum.smithmicro.com/topic/9665/cycles-sss-skin-and-branched-path-tracing/14

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Feel free to call me Ohki!

Poser Pro 11, Poser 12 and Poser 13, Windows 10, Superfly junkie. My units are milimeters.

Persephone (the computer): AMD Ryzen 9 5900x, RTX 3070 GPU, 96gb ram.