The Outerra Website has info on this 3D "planetary engine" that offers "a world rendering engine capable to seamlessly render whole planets from space down to the ground level. It can use real world data to render the planets realistically, while it also dynamically refines the data using procedural algorithms to provide high ground-level detail." A Tech Demo is available, and MAKE has a write up on the engine and Anteworld, the first game that will use it, offering an Anteworld trailer showing off the engine. Thanks Ant via Boing Boing.