Various canisters and cargo containers appear to be suspended by Anti-gravity throughout this film. These effects were executed by several of Alex Weldon's assistants. The crew built a circular track that had the same shape as the corridor and suspended the anti-gravity prop on four small wires that connected to the track. The wires were treated with a special acid which oxidized the metal; the reaction tarnished the wires to a dull gray that would not show up in the deep blue corridor lighting. Cargo boxes were made out of light balsa wood so that fine wires could be used as support.

Film

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