The way I'd do it is to have each room a separate movie (if you start trying to do complex stuff on a single timeline it gets unwieldy).

Then, depending on whether each movie is zoomed in or out, set a variable to act as a flag: r1z=1 for room 1 zoomed in and r1z=0 for zoomed out, etc.

You could then use an if/then structure in each movie(or the switch structure) to decide what to do.

Does that make sense?

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Sualdam