Breathing Square

Please note that you will need a Java(TM)-aware browser to view this illusion.

This is a brand new ambiguous motion illusion.

Here is a rigidly rotating green square. Using the bottom scroll bar slowly occlude the rotating square and see what happens to your perception of its rigidity. You will see it shrink and expand even though the square's size remains constant. Also try varying the shape of the occluder by clicking inside the applet's window.

Our apologies to viewers without Java support.

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.......... Copyright IllusionWorks 1996 Programmed by Laurent Itti!!!