Anyone know how the material roughness/metallic is captured? For instance here https://www.metmuseum.org/art/collection/search/253348. I've only seen basic albedo for 3D scans before. Maybe it's just hand-authored.

It's kind of annoying that the 3D viewer on their website keep you a respectful distance away from the object like you might try to touch it if you got too close.

I see the “spinning” view in browser, but I don’t see an option to download the STLs.

Edit: It appears the usdz AR file can be converted to obj/stl files.