Then again, If I use the default female character in CC, and apply Skin-Gen texture and export USD as path traced, max texture size 4096:
Not bad! I cannot see those white line rendering errors anymore, not is skin or eyelines! Also the SSS skin values at head material values are all correct, 1 and not 1.25.
So these errors are something specific to new Scan Reality characters, like Natasha?
I have to make some more test, but this looks like the issue…