An optical illusion is the phenomenon of perceiving an image different than it is in reality. They have been used in creative art since hundreds of years ago and today they continue to play tricks with out brain, as modern artists reproduce and continue to create them. In today’s post we will present the 40 most impressive (older and newer) optical illusions created with the help of computers and CG. Some refer to color changing, some to shapes and some to sizes and all can make us wonder “how can it be…?”. Some images can make you feel dizzy if you stare too much at them, so be careful and avoid seeing when very tired. Other than this… enjoy!