Hope you don't think I'm following you around... :biggrin: - I'm so NOT! But you're moving in much the same way I am in so many ways I guess we keep bumping into each other.

First off, the pupil I just set to DiffuseBDSF(Black).

Cornea:

Iris:

Lashes:

...and while the result is nothing to write home about (still getting my head around lighting) it sort-of works:

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