Actually, Esther is on to something... and it is about the new lighting. You will encounter issues with P8+ lighting and legacy shaders... this is just the way it is. Old shader: old lighting systems. You might try one of your favourite lights and render without IDL... works a treat, doesn't it?

I'm having to convert all my hair and clothing (and skin... heck, just about everything) for the new lighting. Have a read what Bagginsbill has to say about the new lighting and shaders: he does have several suggestions to make.

Oh, something easy you can do: turn of that bloody refl_lite_mult tick-box. Might make a difference, just there! :biggrin:

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks