Shepard tabletop illusion
... that in the Shepard tabletop illusion , identical parallelograms look very different?
... that in the <b id="mwBzY"><a href="./Shepard_tables" id="mwBzc" rel="mw:WikiLink" title="Shepard tables">Shepard tabletop illusion</a></b> <i id="mwBzg">(pictured)</i>, identical <a href="./Parallelogram" id="mwBzk" rel="mw:WikiLink" title="Parallelogram">parallelograms</a> look very different?