another thing they could do is have specially made bricks, like space guy's jvs doors.
1: Space Guy had nothing to do with JVS, it was Trader and Kaje
2: The doors are just bricks with rendering turned off and a DTS model of a door put inside the brick itself.
There was a drivable build card in v0002, when bricks where dynamic objects that could move. But even that was glitchy.
Note that the above was only even possible in v0002, not Retail. Read above posts for the "Can't move Retail Bricks" blah.