This model was created by stacking the frames of an animation into a 3D set of voxels. See the 323 project for more details. The animation that created this model is here. I first created the Sphereflake model back in 1987. For this version I pushed the balls into the surface a little so that it was printable. Alexander Enzmann was the first to come up with this idea and first to print out.
My goal in life is to have one person buy one of these.