Eye of the Tiger
Some optical illusions indeed need the participation of more than one person to be successful. For example, consider a design in which three ladies join together to form a tiger that gazes deeply into our souls as if daring us to fight Rocky. Alternatively, it may intend to nibble our faces off.
To pull off this optical illusion, the artist called upon three ladies—two to play the eyes and one to crouch over and create the nose. Being in a sitting posture for long periods must be uncomfortable, but it’s worth it if you can bring home a prize for the best body paint performance.