Description: This image is part of a 3-4 part project based on the forerunners from the Halo games, this was inspired mostly from the new game Halowars which is awesome. It shows a dyson sphere type construct which is earthlike on the outside but very hostile as almost all the surface is ice, however inside is a lush utopia with its own artificial sun.
To the left you can even see one of the moons being mined for resources to build the huge thing, me thinks they will be needing some more moon.

Enjoy