Regardless of whether or not you think 3D is a fad, you can’t deny that Avatar has changed the face of cinema. Being the top grossing film of all time and the best 3D film ever made is only a few of it’s accomplishments. James Cameron, the director of Avatar, took some time to sit down with G4TV and show off the 3D camera rig used in the filming of Avatar.

Most 3D cameras use a side-by-side lens setup. Cameron explains how he believes this is an ineffective way of filming 3D. His camera rig uses a beam splitter to allow the camera’s lenses to be practically on top of each other; thus giving them more control of the depth of 3D.

Watch both parts of the full interview below.