I think a good half of it is painted walls, right? Then the center section....imagine it divided into four sections...the first being the entrance that everyone sees. On the opposite side of that, is the open section that overlooks the Living with the Land ride. You don't see the ride really, just the tops of the trees for the most part. You can go look over the railing though and see everything below.
When we went, we got about half way around by the end of the meal...VERY slow moving!