http://www.youtube.com/v/VuoljANz4EA

Quite an interesting vid! Its amazing what our Brains do daily :)

Wow. Imagine how much process a game could save by using this
technique.

Wow. Imagine how much process a game could save by using this
technique.

There was a game ("Duke Nukem 3D Atomic Edition") that sorta used that technique or at least the users said so which made the First Person Shooter 2.5 dimensional. I don't see how that it is possible as it looks very 3 dimensional (3D) to me.