I'm going to turn into a monomaniac if I'm not careful.

Oops. Too late.
Zeroing in on the interaction between v_texture_coordinate and FractalSum. Left other settings at default:
FractalSum(
    .4 *** v_texture_coordinate()), 4,** 4**, 8, .5, .5, .5)**

...

Uploading all the next three hours worth of trials is more work than it's worth. However, I kinda think I might have gotten somewhere, after all:

Still a very long way to go. Might be a bogus solution. Knowing me, probably is.

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