The transformation scene was intended to be done in one shot with a technologically new camera rig that would be programmed to shoot from multiple angles as if it were a single shot. However, an unforeseen problem was that, since no one had ever used one before, it took two full days to program the rig properly
Nick Damici did various things wearing a blindfold in order to get into character as Ambrose McKinley.
As Ambrose states in the film, it is in fact legal for the visually impared to own firearms in the United States. Disabled Americans have the same protected rights as any other American gun owners.
An earlier cut of this film had a lot of dissolves for scene transitions. There was also a radically different score for an earlier cut of this film.
Haythem Noor, the guard at the gate, is reading a magazine named "Devoured ".