Oh, I think you need to make the ‘collider’ an Active and Animated Rigid Body, just like the tractor. Or even make it part of the tractor, but with a Transparent Material.
All Objects that are part of the Simulation should be Rigid Bodies, I believe and you can’t simply Parent the ‘collider’ to the tractor, as I originally proposed, that is not allowed.
I don’t do a lot of Physics Simulations, so when I do, I just have to figure things out along the way.
The Vertical restriction of the shards, shouldn’t need floor and ceiling planes…I mean the actual floor where the tractor rides on, should prevent the shards from falling down and Gravity should prevent them from going up too much, right?