JoshKlint

Since GLTF is a _scene_ file format, even though I use it exclusively as a model format, it makes sense that different objects in a scene would have different collision...

I'm coming from Newton, but the features of Blender largely line up: https://docs.blender.org/manual/en/latest/physics/rigid_body/properties.html - Box - Sphere - Capsule - Cylinder - Cone - Convex hull - Mesh Again, I...

I am willing to help in any way. I don't have any experience writing extension specs but I am interested in putting some effort into it.

Docs from 3ds max, looks like it aligns pretty well: https://knowledge.autodesk.com/support/3ds-max/learn-explore/caas/CloudHelp/cloudhelp/2019/ENU/3DSMax-Simulation-Effects/files/GUID-B0C87F87-6E4B-41C4-B0EB-94ACE223E9C9-htm.html

Drilling down into this, an array of positions isn't really a complete description of a convex hull at all. Blender has a minimum triangle area value, and Newton has a...