When I render one of my Vic4-based character, using my Cycles-based material, and I use a hair prop/character, I have to use a Posersurface node for the scalp part, or quite often the RTX-based render crashes.
It sometimes appear using some old pubic props.

Most of the time, if I correct the problem, I can restart an RTX-based render directly (I have a 2080Ti) without relaunching Poser.
So you may have different experiences.

Furthermore: the RTX engine truly hates the old "Ambient Occlusion" nodes....

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