Intresto's free rock models on 3dwarehouse

Real rock shapes were digitised using a laser scanner then I photographed real rock textures which were applied in Sketchup. There are lots of rock models and they can be downloaded for free from 3dwarehouse. Just search for the Intresto collection on 3dwarehouse or follow this link http://sketchup.google.com/3dwarehouse/search?uq=0689629068175189811728180&scoring=m

You can download the models directly into your Sketchup CAD landscapes. To import into Blender, Maya, 3ds Max or other 3D computer graphics software export from Sketchup as dae, import into MeshLab then export as stl or obj.