Skyward

Skyward is a Halo 2: Anniversary multiplayer map intended for use as a Forge canvas. It is one of three skybox-only maps created for Forging;

Description
Skyward shares the same locale and skybox as the map Zenith, though that map's playable area and geometry, including the floating rocks in the skybox, have been removed. Far below, the surface of Installation 05 can be seen rotating with the surface underneath the map constantly moving. As one of the skybox-only Forge maps, the map has no terrain in the playable area except for that which is manually placed by the player.

Trivia
Curiously, the planet Substance in the map's skybox has a dark green hue, as opposed to the deep blue it is typically depicted with.