I think you just nailed why I have been having a hard time with my photo set. It's the lighting. Well crap, because I don't have access to the statue or studio again. Thanks for the tip.
I’m not aware of a fully-baked workflow for that — though it may exist. The first step has gotten really good: the recent single-shot AI models for depth are pretty visually impressive (I don’t know about metric accuracy).
The ones I’m aware of are DUST3R and the newer MAST3R:
https://github.com/naver/dust3r https://github.com/naver/mast3r
Good luck!