Taking this idea a bit further, since one can embed bump information in a colour map, I wonder if one can extract bump information from one of the colour channels of a colourMap. I know, I know: bump is a completely different sort of information that what one would be able to extract from a colourMap, but might it be because there's just too mch, and it's the wrong way around, like eyebrows, for instance. I guess I'm probably way off, but if for instance one could pinpoint the colour of say the eyebrow with component, then reverse it and use it as bump?

Probably not making any sense...

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