Sheesh, do I ever feel like a dummie now, reading these last few posts!... never mind, I seriously will have to have a play with your new shader and try the various parameter changes to see how they affect Charlotte.

I've had an issue using the default shader that comes with VSS and make-up on my female model. If I use image-based makeup (the traditional way - one that is actually a whole lot more work, really and makes for a huge download because of all the texture files) something in the shaders - probably those affecting the lips - change the colours and it looks shocking. Obviously I would need to turn some nodes off or down or something. I'd actually rather not go down that path: much prefering using masks and procedurals (hope that's the right term). I'm other words, I would do some material files, save them as pose files using only nodes to change the colour. I was actually able to change the colour of the lips, but the outline on the lips is artificially precise...

nil blending. Also, I'm baffled as to how to apply this process to the eyes and cheeks, unless one uses a mask... and then, where? In the material_face page in the Material Room?

Perhaps I should have another read of this thread - I'm sure I read something about a solution for make-up...

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