special effects department at Paramount Pictures, assisted by Paul Lerpae, A.S.C. in Optical Photography (blue screen "travelling matte" composites) and Farciot Edouart, A.S.C., in Process Photography (rear projection effects). Fulton's effects included the building of Seti's Jubilee treasure city, the Burning Bush, the fiery hail from a cloudless sky, the Angel of Death, the composites of the Exodus, the Pillar of Fire, the giving of the Ten Commandments, and the tour de force, the parting of the Red Sea. The parting of the Red Sea was considered the most difficult special effect ever performed up to that time. This effect took about six months of VistaVision filming, and combined scenes shot on the shores of the Red Sea in Egypt, with scenes filmed at Paramount Studios in Hollywood of a huge water tank split by a U-shaped trough, into which approximately 360,000 gallons of water were released from the sides, as well as the filming of a giant waterfall also built on the Paramount backlot to create the effect of the walls of the parted sea out of the turbulent backwash. All of the multiple elements of the shot were then combined in Paul Lerpae's optical printer, and matte paintings of rocks by Jan Domela concealed the matte lines between the real elements and the special effects elements. The parting of the Red Sea sequence is considered by many to be one of the greatest special effects of all time. Unlike the technique used by ILM for Raiders of the Lost Ark and Poltergeist of injecting poster paints into a glass tank containing a salt water inversion layer, the cloud effects for The Ten Commandments were formed with white Britt smoke filmed against a translucent sky backing, and colors were added optically. Striking portraits of Charlton Heston as Moses and three women in front of menacing clouds were photographed by Wallace Kelly, A.S.C. in Farciot Edouart's process (rear projection) department, in what are still considered unforgettable scenes. DeMille used these scenes to break up the montage, framing his subjects like a Renaissance master. DeMille was reluctant to discuss technical details of how the film was made, especially the optical tricks used in the parting of the Red Sea. It was eventually revealed that footage of the Red Sea was spliced with film footage (run in reverse) of water pouring from large U-shaped trip-tanks set up in the studio backlot. The