Forget my last post about terrain generators! I'm just going to let the screen/video talk for themselves.
Lithosphere is a GPU driven terrain generator. It allows you to create and export material textures and heightmaps intended for use in realtime graphics applications.
All terrain algorithms are implemented as GLSL fragment shaders operating on floating point textures. This allows realtime modification of the terrain. A graph of nodes is evaluated in order to arrive at the terrain output.
Requirement: 32bit python2.6 (:|), a modern graphics card
Tested on: Windows, Linux