The illusion of the Red Sea parting was achieved by large "dump tanks" that were flooded, then the film was shown in reverse. The two frothing walls of water were created by water dumped constantly into "catch basin areas", then the foaming, churning water was visually manipulated and used sideways for the walls of water. Gelatin was added to the tanks to give the water a consistency like sea water. The dump tanks have long since been removed, but the catch basin still exists on the Paramount Pictures lot, directly in front of the exterior sky backdrop, in the central portion of the studio. It can still be flooded for water scenes. When it's not being used in a production, it is an extension of a parking lot.

Film

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