File:H3 Valhalla out of bounds.jpg

A screenshot taken from high above Halo 3's multiplayer map Valhalla. The player used a Banshee and a glitch to get this high.

The rectangular area in the center is the normal playing area; the "ring" of terrain surrounding it is the level's backdrop. The area between the playing area and the backdrop is a void that the developers didn't even bother to model, as it cannot be seen under normal circumstances.