Are there plans to use a 3d models geometry as the collision shape? not optimized it can be a huge performance sink. but it would be great to hide a simplified 3d object that represents the worlds collision alongside a separate one for the visual.
I don't have an exact model. But for a racer it would involve the parts of the map you actually race on. and for a platformer/shooter it would be buildings, cave systems, and so on. placing individual colliders would be time consuming. and some geometry does not fit cleanly inside primitive shapes.