Exactly, CobaltDream, which makes it impossible - at least, so it seems to me - to make a one-mask-fits-all... not for the lips, anyway. Even for the eyeliner, I had to tweak the mask a little. It seems resource kit people take a few liberties with texture alignment... wonder if they're all like that?

I suppose I could always make my own texture set from photographs and stop my whingeing...lol

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