@RoseHawk The ambient nodes are meant for things that glow or produce light. Hair does not do this and that makes that a bad hair shader to begin with.

@ChromeStar Yes, I got a CUDA error in the log and Poser needed a re-start for the GPU to work again. My RTX card is not running the monitor so I did not have to re-boot the system to get it to work. I'm not using my older card in Poser and that way I can surf the internet, play video games or watch a movie without disrupting a render.

W10, Ryzen 5 1600x, 16Gb,RTX2060Super+GTX980, PP11, 11.3.740