another Animation question

[Hunter B]

I want to create an animation that starts with the ground plan and then drops into the room and rotates toward a presnter at a lectrun. I almost have it but I need to be able to see the ceiling from the "inside" of the room but I need to see thru the celing when I'm looking at the ground plan of the room. Is there a way to get the ceiling to be tranparent from the top but opaque once I'm under it??? does this make sense?

or how can I swith off the ceiling in one sheet and turn in back on in another?

[Kaare Baekgaard]

Try out AnimationWorks from OzCAD. Its simple, inexpensive and good, and it will do the trick.