How 3D Works

It seems like 3D is everywhere. Movies, living rooms. Even real life is 3D! But how does it all work?
Most 3D operates on a single basic principle—tricking our dumb, binocular brain into interpreting a 2D image into one with depth. The most basic way to do this is stereoscopy, which is essentially showing a slightly different image to each eye, which the brain mashes together into a 3D image. more...