Adding collision to a MeshPart, but only in certain places

This car’s mesh cannot collide fully, or else the wheels will get forced out like the below image, and the engine won’t have enough torque to move them, and suspension won’t work, and a whole slew of other issues (this is a physics-based, rather than a body-mover-based suspension system):

There’s the solution of collision groups (making the wheels collide with anything but the car body), but that also comes with its own consequences. I have a different idea first.

I want to add a hidden ‘hitbox’ with the same shape as the mesh, but without collisions in the wheel areas - allowing the suspension and stuff to work, and also allowing the car to collide with things other than with the wheels. Hee.

This shouldn’t be possible.

Union operations don’t work with MeshParts. Any ideas? Is there some sort of plugin that can copy the overall shape / collision geometry of the MeshPart using normal Parts or UnionOperations?

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Don’t think you can always trust the collision boxes which ROBLOX do.

Unaware if there’s any alternatives however- unless you just carve out the collision boxes by hand

What do you mean? I don’t need an exact replication of the visuals of the mesh - hell, I’ll probably manually build a collection of invisible boxes that rough out the shape of the car if I can’t automate it. Doesn’t need to be too detailed.

Saw your edit too.

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