The model was created in Cinema 4D. The Cinema 4D file format zip archive contains both a Cinema 4D R9.6 version and a Cinema 4D R12 version. A HyperNURBS (smooth modifier) is included and the mesh density can be varied with it. The other formats contain two versions: a subdivision cage and a mesh subdivided to level one.
Each format contains 4096x4096 pixel Jpegs and the model is UV mapped. Layered PSD files and TIFF files are also provided as accompanying downloads.
The preview images were rendered with Cinema 4D R12, using the advanced renderer.
No 3rd party plugins are required.