Just realized I completely forgot to post these, here's a quick update on the Movie!Werehog model
Starting off with, the quills. I figured out how to use geometry nodes to generate them from curves, then place a premade texture on them for the white markings. I still need to tweak the texture mapping as well as the underlying spike modeling, but this is almost exactly what I had in mind. I might make the banded section wider though.
(Zoom in, there's little white rings sort of like those on actual hedgehog quills)
I also replaced the iris texture with a high-res one. For context, the original one was grabbed from that one Home Alone parody poster. It worked well enough as a placeholder, but it was definitely a bit crusty.
Wondering if I should give him darker limbal rings to make them stand out more, or just make his eyes as close to canon as possible.
Oh, and I also figured out how to blend materials together using vertex-based masks. I could probably make a more precise one using a texture, but I haven't properly unwrapped the model yet, so until then I can't really do any texture painting.
I'll probably go in and do some proper texturing for the eyelid edges and caruncula (inner corner) at some point.