The world of photogrammetry (or photoscanning) has come a long way in a short time. Last week I took 36 photos of some rocks on a beach in Royal National Park just south of Sydney and used 123D Catch to create a 3D model.
You can see a video of the model from the point of view of a camera flying around it here on YouTube http://youtu.be/ObXFwvEL8JE
A few of the photos and the 3D model displayed in MeshLab are shown below.
The good thing for Rocksolver is that this type of technology can be used to update the shape of the rock structure as it is being built so that cumulative errors are avoided in our rock-packing algorithm.