By "process differently" I meant: slightly different bump values going from mid-lip to edge (slightly different values in 1_Lip and 1_SkinFace), and slightly lighter colour for the main body of the lip vs the edge, so as to simulate lip-liner.
Note the word 'slightly'.

Won't be doing that now, since I can accomplish this much more effectively with masks, where a mask can indicate a shine gradient (which I think is awesome!) and other really cool effects!

Not a worry - I can make this work. This is an incredibly versatile script. On Node Cult I started a thread on elegantly-written code: been studying this over the past few days and I gotta say: this fits the bill (sorry, pun not intended).

Did my first render. One never shows first renders. Good reason for that.

But, the script works as advertised. Now, a bit of tweaking and getting a handle on that node-placement hack script you wrote for IsaoShi and we're laffin'....

I'll be back... and thanks, Bill.

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