Structure Synth http://structuresynth.sourceforge.net/ http://structuresynth.sourceforge.net/ works similarly in 3D. I've used it with SunFlow http://sunflow.so

Structure Synth http://structuresynth.sourceforge.net/ http://structuresynth.sourceforge.net/ works similarly in 3D. I've used it with SunFlow http://sunflow.sourceforge.net/ http://sunflow.sourceforge.net/ to make some pretty neat images relatively easily: http://www.getdropbox.com/gallery/111770/1/grfx?h=7e3f2e http://www.getdropbox.com/gallery/111770/1/grfx?h=7e3f2e (view full-size for best effect).