Quote - There are quite a few hair models that use either ambient or translucence in their shaders. This also slows down IDL calculations. I have to go in and rework the shaders and save the material collection.

I've had that happen too... what changes do you end up making, if I may ask?

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