Couldn't hardly wait to get up this morning to try all this new stuff. Of course, I did a fair bit of fumbling, plugging nodes together incorrectly at first (with absolutely shocking results), but I finally got it the way I think it's meant to be:

And no, Bill, this is not complete... I wasn't sure how I would apply the same gain/bias set-up for eyeshadow, or if I really wanted to. I'll leave it to you to comment on that (explaining the advantages)... in any event, I can see massive potential for creating multiple layers for eye-shadow, which is essential for a decent effect. Just keep daisy-chaining those blenders on out and yer laffin'. You can even introduce a bit more specular to the outer layers for that dramatic, sultry look... so this is only stage one, here:

Yep, I AM having way too much fun with this!! And I know just enough to be dangerous.

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