>>11363392
Actually, on revision, the deltoid is correct. Its the AI one I was looking at that had too many regions.

I just can't discern which some muscles are meant to be, but it's hard to tell id that's because some individual ones are oversized or if you're adding new muscles
Here I labelled what I think is going on, and thr things that I think are wring or am confused about.
For studying anatomy, kenhub is pretty handy. I was working on a leg anatomy chart when I was fixated on making lowe body routines in the bottom heavy boy thread using the crossections from kenhub and some 3d render (i can't remember from where) https://files.catbox.moe/fkoikj.jpg
Using Cross sections along with anatomy external views is handy, though it can be tricky to get the internal ones right (they seem to merge together, so I'm not sure if they are correctly discerned). The light gray is internal muscles, dark is bone, and white is fascia/tendon