"Stars" is a 3D Universe simulator that I worked on as a school project. All structures are generated, from superclusters to planet surfaces. This is an in-game screenshot with added logo. Textures and logo by Adam Johanides.

This is just many layers blended together. It renders objects with random saturated colors into a buffer and then makes it control the hue of other layers. Groups of small stars, big stars, "nebulas" and a seamless background. That's it.

Download Stars:
https://docs.google.com/file/d/0B1HYbP9IcB6LNjJIczk5dHFHX2M/edit?pli=1