9. Felice Varini
This Swiss artist isn’t primarily known as a street artist, but his work has definitely shown up on the streets. What he is known for is creating the illusion of flat designs on three-dimensional spaces like the interiors and exteriors of buildings. Only fully visible at the correct angle, his anamorphic designs will just look like line fragments when viewed elsewhere. He has created a number of rad installations on the exteriors of a group of buildings, making your eyes play tricks on you as you see floating circles or other geometric designs in urban spaces.