Fun thread, hey?

You need to understand something about the shader script first, Believable. The script gets run in Matmatic which generates a material file (mt5). This file then gets loaded into the VSS prop under material Template Skin. Now, from what I understand from Bill's post just above yours, VSS makes some decisions about what to put where depending on what it finds.

VSS assumes that you either have a colourMap (jpg UV mapped to that body part) for your various materials... or not. A bumpMap or not. A specularMap or not. It decides when you click synchronise what needs to happen based on what it finds out in the material fields.

I tested this: took my bump map node out of my 1_SkinFace material, then synchronised. So, it plugged in a math_functions(sub) 1,.5 and plugged in that Turbulence node with the above parameter values into Value_1 of the Sub node.

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