Visual Illusions

Three of the visual illusions that were among finalists for "2009 illusion of the year":

http://illusioncontest.neuralcorrelate.com/2009/another-turn-a-variant-on-the-shepard-tabletop-illusion/

http://illusioncontest.neuralcorrelate.com/2009/the-illusion-of-sex/

http://illusioncontest.neuralcorrelate.com/2009/contrast-color-induced-by-unconscious-surround/

And the winning entry:

http://illusioncontest.neuralcorrelate.com/2009/the-break-of-the-curveball/