It is a multi-angle DVD of the Aquarium. You switch angles depending on what lighting you want.
Correct me if I'm wrong here Morgan/Jim, but "angles"??? I thought that you didn't want to use different camera angles in the MA because of the problems it might cause? I remeber that I had requested a couple of different camera angles LONG ago, but Jim said it wasn't ideal for how the MA is laid out because it could expose the backside of geometry, etc.