This is very cool and it looks like the Transformer is really in the scene. That, in itself, is an accomplishment that some SyFy channel moviemakers cannot achieve.
the link goes to your destruction car FX video, which in itself is quite cool, though the dirt not falling into the hole doesnt look right, even though it later sinks down as if on an elevator
@ Small Troll : yes, you’re right about the dirt. It should start fall from the center and finish at the boudaries of the hole. I’m thinking of improve this :).
when you press the set up scene button after tracking, blender automatically adds a shadow catcher to the scene and sets it up for you in the compositor