Rhia474 posted at 7:18PM Sun, 11 July 2021 - #4422130

Thank you ! I would start with one infinite light only first since you have the envirosphere that also casts light. With one light only, render, then with same one light try increasing pixel samples, then bounces. Change only one variable at a time. I suspect it is shadows cast by transmapped hair strands calculated from multiple light sources.

I was having a similar issue but the hair just had white sparkles everywhere, unchecking 'indirect light' fixed it.