So, the other day I was messing around with SM64DS Level Editor, and I found something interesting. In the room behind the 8 star door with the Mario painting in it, apparently the "unreachable balcony" has a path on the outside of it (which leads to nowhere but a black void. This confirms that the balcony is part of the room model, but I can't explain the mystery path. Remain from a beta version? No idea.