This is a model of a hollow elephant sculpture. The original elephant could only be made by sand casting, consisting of only a pattern and core box. This was changed using 3D scanning and digital manipulation, allowing you to print it.

The model was produced in an unusual way, being derived from scans of the pattern and core box rather than of a positive model. The 'rock' is actually a small piece of the gating system that can't easily be separated from the model.