Ok I think I have come up with the most efficient method, basically the "wave texture" node is pretty good at contour lining because apparently its independent of the mesh so the end result is more organic and less squarish. The downside is that I can't make the bands transparent, so overlapping the "wave texture" is only possible using special HSV and a suitable colour blend mode (in this case divide works well). After that I have to bake the texture to make it usable as a glb. At least this way I get a textured image, so if I'm not happy with the result I can edit it in an image editor to get even better results. If the code for the wave texture is simple enough, I think I can code a contour line node :).
I didn't know about baking textures, so maybe I can bake a freestyle render, which would probably be even better?
>>959278
>>959280
Thanks Anon I will try it, looks good, geometry nodes are pretty powerful, your image is a bit low res so the node texts look blurry in the future maybe a little zoom a little bit more.
>>959277
Yeah, I was thinking the same thing, but I need to get more mileage out of Blender because my first attempt at painting was awful.
>>959283
You sound emotional deprived anon I can be your friend :), I don't know but I've learnt a lot.