I Enjoy Optical Illusions The Coffer Illusion may initially appear as a series of sunken rectangular door panels, but after a few seconds, your brain's representation of the image may 'flip' to give you the experience of 16 circles :)
I Enjoy Optical Illusions In Gianni Sarcone's Mask of Love, a Venetian mask can be seen to contain either a single face or the faces of two people kissing. The contours in the image can be grouped in two different ways, leaving the brain uncertain about which to choose :)