Originally Posted by tehhaxorer
I am no expert in programming, but couldn't that just be coding for a character model?
It's actually simpler than that, even.
The 3D effect is achieved by having two cameras (camera, as in, the point from which information is displayed on-screen) that are slightly displaced from each other horizontally (and their angles adjusted appropriately). One camera gives the left eye view,the other gives the right eye view.
This dual-camera setup is commonly rendered out as either being both images side-by-side or one atop another, and then this actual frame is divided and rendered appropriately by the monitor itself.
The tricky part, of course, is getting the right displacement between the two cameras.