As far as I know, this guy, Pietro Perugino pioneered point perspective. He allowed for depth in pictures using angles instead of or in addition to for example, atmospheric perspective, where colors fade the further away they are.

I saw David Hockney speak about his new portraits saying that it is important to flip perspective when you are a painter. He is disgusted with potography now. So many years looking through one eye, when all that time he has two eyes.

Nature on tv, in a flowerpot behind the tv, and through the windows and in the paintings behind that.