3d shape exclusion

Hi can Fusion subtract one shape from the other for ex. I need the cube to be slightly cut off by it's angles, so I tried override 3d to set to matte - it works, but only if the camera is not rotating - when it is the matte is hovering over more space - the actual shape that it is is covering the original shape needed t obe cut and it becomes the giant invisible cube!

there are no real boolean operations on 3d shapes possible. Only workarounds.
Maybe u post pictures of your needs or post your comp, to helping out.