Created by Gianni Sarcone , Courtney
Smith and Marie-Jo Waeber, Venetian
mask below holds an interesting secret!
Before we begin, I’d like to ask if you
notice anything special in it? Observe
carefully! Now if I told you how surprising
number of people miss noticing that the
main component of the mask is actually
composed of two distinct faces – a man
and a woman kissing one another, how
would you react? Apparently, once the
viewer discerns two individual faces, his/
her brain will flip between two possible
interpretations of the mask, making the
viewer perceive two faces or one face in
alternation. This kind of illusion, where
the viewer experiences two equally
possible interchangeable stable states in
perception, is called bistable illusion.

wow, so true. . my eyes keep moving to a whole face and two faces

Cool