Sometime before 2012, someone created a modified version of the Shepard elephant. The modified elephant has an extra hind leg, with foot attached, made by extending the curved line that Shepard left ambiguous (to look like either the top of a leg or the end of a tail.) This modified image, which now has four legs but five feet, was circulated as "How many legs does this elephant have?" The Shepard elephant has also inspired some other derivative works. Dutch psychologist Hugo Schouppe made a video, showing how GIMP can be used to reverse-engineer the elephant illusion, moving its feet so that each one connects to a leg. The OpticalSpy website also cited the Shepard elephant as inspiration for manipulating a photograph of an Indian elephant to give it six legs.