The Liminal Universe Shaper is a piece of software that enables people to design their own cover for the album Liminal by Exivious. Every cover is stored on a server, and is used as the starting point for a new design. By using this tool, all fans contributed to the final cover. Every individual cover is printed and send to the user that bought the special edition.
The tool is written in C# using Unity. The (final) rendering is done in Houdini with Mantra. I have made the code publicly available, together with the rendering framework. For more information visit: http://www.apileofgrains.nl