<P> Yoda was originally not meant to appear in the film, but Marquand strongly felt that returning to Dagobah was essential to resolve the dilemma raised by the previous film . The inclusion led Lucas to insert a scene in which Yoda confirms that Darth Vader is Luke's father because, after a discussion with a children's psychologist, he did not want younger moviegoers to dismiss Vader's claim as a lie . Many ideas from the original script were left out or changed . For instance, the Ewoks were going to be Wookiees, the Millennium Falcon would be used in the arrival at the forest moon of Endor, and Obi - Wan Kenobi would return to life from his spectral existence in the Force . </P> <P> Filming began on January 11, 1982, and lasted through May 20, 1982, a schedule six weeks shorter than The Empire Strikes Back . Kazanjian's schedule pushed shooting as early as possible in order to give Industrial Light & Magic (ILM) as much time as possible to work on effects, and left some crew members dubious of their ability to be fully prepared for the shoot . Working on a budget of $32.5 million, Lucas was determined to avoid going over budget as had happened with The Empire Strikes Back . Producer Howard Kazanjian estimated that using ILM (owned wholly by Lucasfilm) for special effects saved the production approximately $18 million . However, the fact that Lucasfilm was a non-union company made acquiring shooting locations more difficult and more expensive, even though Star Wars and The Empire Strikes Back had been big hits . The project was given the working title Blue Harvest with a tagline of "Horror Beyond Imagination ." This disguised what the production crew was really filming from fans and the press, and also prevented price gouging by service providers . </P> <P> The first stage of production started with 78 days at Elstree Studios in England, where the film occupied all nine stages . The shoot commenced with a scene later deleted from the finished film where the heroes get caught in a sandstorm as they leave Tatooine . (This was the only major sequence cut from the film during editing .) While attempting to film Luke Skywalker's battle with the rancor beast, Lucas insisted on trying to create the scene in the same style as Toho's Godzilla films by using a stunt performer inside a suit . The production team made several attempts, but were unable to create an adequate result . Lucas eventually relented and decided to film the rancor as a high - speed puppet . In April, the crew moved to the Yuma Desert in Arizona for two weeks of Tatooine exteriors . Production then moved to the redwood forests of northern California near Crescent City where two weeks were spent shooting the Endor forest exteriors, and then concluded at ILM in San Rafael, California for about ten days of bluescreen shots . One of two "skeletal" post-production units shooting background matte plates spent a day in Death Valley . The other was a special Steadicam unit shooting forest backgrounds from June 15--17, 1982, for the speeder chase near the middle of the film . Steadicam inventor Garrett Brown personally operated these shots as he walked through a disguised path inside the forest shooting at less than one frame per second . By walking at about 5 mph (8 km / h) and projecting the footage at 24 frame / s, the motion seen in the film appeared as if it were moving at around 120 mph (190 km / h). </P> <P> John Williams composed and conducted the film's musical score with performances by the London Symphony Orchestra . Orchestration credits also include Thomas Newman . The initial release of the film's soundtrack was on the RSO Records label in the United States . Sony Classical Records acquired the rights to the classic trilogy scores in 2004 after gaining the rights to release the second trilogy soundtracks (The Phantom Menace and Attack of the Clones). In the same year, Sony Classical re-pressed the 1997 RCA Victor release of Return of the Jedi along with the other two films in the trilogy . The set was released with the new artwork mirroring the first DVD release of the film . Despite the Sony digital re-mastering, which minimally improved the sound heard only on high - end stereos, this 2004 release is essentially the same as the 1997 RCA Victor release . </P>

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