This model was originally created in 3DS Max 9 with optimizations for rendering (low poly model + turbosmooth modifier for flexibly adjusting the model's smoothness). There are both versions for default Scanline as well as V-Ray rendering (for 3DS Max). Last images show a 3d printed sculpture of this design.
STL (Stereolithography, filesize: 1.02 MB), OBJ (OBJ, filesize: 492 KB), MAX (Autodesk 3ds Max, filesize: 780 KB), FBX (Autodesk FBX, filesize: 430 KB)