With the intention of creating a floor with walls and an open ceiling, I removed the top face of a large cube. I set it’s Rigid Body type to ‘Passive’. I then have a series of smaller cubes falling down on to it (Rigid Body Type is ‘Active’). My hope was that the cubes would fall down to the floor. However the falling cubes are hitting the ‘removed’ face (ceiling) of the large cube, as if the face is still there. I also noticed the same behavior if I used a plane and extruded the edges up the Z axis.
Here is a quick 4 second video to demonstrate it: collision demo
Does anyone know what I should be doing differently to have the falling cubes hit a floor?
