I’ve just discovered the mind-blowing Felice Varini. What looks like a Photoshopped translucent pattern layered over a photo are actually painted walls, floors, ceilings (and any other objects that get in his way) resulting in the optical illusion. He’s been creating these for over 30 years and there are so many that it’s hard to choose which ones to post. I suggest you look at them all here.
via art.is.analogue.