Nev3r I'm not sure what you mean, do you mean its pretty obvious enough already that its the Hidden Palace? Well yes it is because you have The Chaos/Master Emerald there and the floors are from Hidden Palace, but that's not the point, if you're trying to recreate S3&K in 3d the the whole thing has to look like S3&K in 3d, you can't have the entire background looking like GFZ it doesn't match, and ruins the mystical feeling of the zone and that its the home of the Master Emerald.
But as I said they're probably just not finished with the background.
I meant it's barely finished.