I have some vehicles that I want to make non collidable with only themselves i.e. the wheels can pass through the vehicle but not through other vehicles. I know there are collision groups but I can only have 32 of them. Collision constraints seem possible but are just annoying to create one for every single part in the vehicle model as that would be an insane amount of constraints.
Setting them all to have the same collision group and have that collision group collide with the default collision group, but not its own.
you can use nocollision constraint but its very tiring if the model is big