Amazing 3D optical illusion street art by Kurt Wenner
A new book collects the 3D street art of Kurt Wenner, a former NASA employee, who uses his mathematical skill to create three-dimensional illusions on pavements across the world. When viewed from the correct angle, people standing on top of them look like they are floating in thin air, and solid concrete can look like gaping chasms. Kurt has been perfecting his technique since 1982. Now, using the skills he has perfected over 30 years, he is able to create stereoscopic images, such as the one above enabling people to walk along imaginary webs slung by Spiderman.
