I've been working on a good room set up for Motherworld. It ended up being fairly complex. It was more complex than a level editor, even though same in concept, because every item is saved in a pocket and that pocket has to be changed to many variable items. Overall, it works very well.
Whoops, had a wallpaper glitch. In the editor I put the night sky on. But it applied the "Meadow Wallpaper" when I walked through. It's not simulated or anything, it's just a glitch.