Ambiguity is defined as doubtfulness or uncertainty with respect to interpretation.  In the image below, a string is threaded through a series of tubes.  Do you notice anything doubtful or uncertain as you try to interpret how this string is threaded through the tubes? This image was designed by Kaia Nao.

We have featured terrific motion illusions from optical artist Kaia Nao in the past.  If you missed them, you may want to take a look at the floating star illusion and tunnel vision.  Below, he has created a design that features ten very colorful caterpillars.  When you look at the entire image, do they appear [...]

Optical artist Kaia Nao designed the following star that incorporates a peripheral drift effect applied to a random pattern.  Does it appear to be moving? This illusion was selected to be a finalist in the 2012 Best Illusion of the Year Contest.

As you look down this tunnel designed by optical artist Kaia Nao, does it appear to be moving? This image is completely static and not animated in any way.