Annotated photograph used in the production process for the `Parting of the Red Sea' sequence from the film THE TEN COMMANDMENTS, 1955: Henry Wilcoxin as Pentaur the chariot driver in sea bed, no. #BF 122-2.

This is a red separation positive made from the original negative of Wilcoxin on the chariot, during rehearsal at a static moment. The blue screen looks dark in the red separation, one of many intermediate steps used to make optical travelling mattes.

In the final shot as seen in the film, the horse runs on a treadmill in front of the blue screen, which later becomes the Red Sea wall of water. This moment is for a single shot of Wilcoxin in pursuit of the Israelites, who have just reached the other side.