Previews were rendered with Vray.Materials included.
OBJ (OBJ, filesize: 690 KB), HRC (Autodesk Softimage, filesize: 345 KB), LWO (Lightwave, filesize: 70.1 KB), 3DM (Rhinoceros 3D, filesize: 213 KB), 3DS (3D Studio, filesize: 81.8 KB), MAX (Autodesk 3ds Max, filesize: 117 KB), MA (Autodesk Maya, filesize: 446 KB)