The rocks in the image above are all virtual 3d models and are a selection of over 60 models available for download from the Intresto collection on Google’s 3dwarehouse (http://sketchup.google.com/3dwarehouse).
All the models were derived from real rocks so they have a natural look even when scaled to the size of a small stone or large boulder. The pile of rock rubble in the top left and the lower middle rock were “scanned” using a digital camera and the point cloud derived using the Photosynth photogrammetry application. The other rocks were digitised using a 3D laser scanner. All of the models were processed as triangular meshes using MeshLab and then textures applied using Sketchup.
The structure on the lower left was built in Sketchup following a plan devised by our Rocksolver software. There’s more about this structure being tested to destruction in a previous post below.
The models can be imported for free directly into Sketchup, used in your landscaping or hardscaping projects or exported as a Collada dae file then imported into Meshlab. From MeshLab they can be saved in a range of 3D formats such as VRML, obj, ply or stl then imported into CAD or 3D animation, graphics and rendering applications such as Blender. Have fun.