It seems like 3D is everywhere. Movies, living rooms. Even real life is 3D! But how does it all work?
http://www.youtube.com/v/fS9XLU0Yo5U?fs=1&hl=en_US
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.
How 3D Works [Video] (http://gizmodo.com/5717004/giz-explains-how-3d-works)