To be honest, what started this was texturing Charlotte with just the skin textures and being very unhappy with the resulting render - so I realized skin shaders was what was going to make Charlotte more appealing.
I had purchased face_off's tools (Real Skin Shader bought on Daz and Occlusion Master here) but understand that the product of applying these tools cannot be distributed, so I thought I'd have a play with other tools out there - one that don't have that restriction - to see if I could put something together that would be better than what I had. Not a hope in hell of reproducing what face_off did, but at least gain a better understanding of shaders and the material room and all that.
I have no intention of distributing any part of Matmatic or VSS with my content. However, my understanding is from what he wrote in his Conditions of use is that the product of running Matmatic - the resultant shaders - can be distributed. Does that hold true for VSS as well?

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