<P> The sound of the respirator function of Vader's mask was created by Ben Burtt using modified recordings of scuba breathing apparatus used by divers . The sound effect is trademarked in the U.S. Patent and Trademark Office under Trademark #77419252 and is officially described in the documentation as "The sound of rhythmic mechanical human breathing created by breathing through a scuba tank regulator ." </P> <P> Commentators have often pointed to the influence of Akira Kurosawa's films such as The Hidden Fortress (1958) on George Lucas, and Vader's Samurai - inspired costume design is held up as a significant example of the Japanese influences on Star Wars . </P> <P> Darth Vader was portrayed by bodybuilder David Prowse in the original film trilogy, and by stunt performer Bob Anderson during the character's intense lightsaber fight scenes . Lucas originally intended for Orson Welles to voice Vader (after dismissing using Prowse's own voice due to his English West Country accent, leading to the rest of the cast nicknaming him "Darth Farmer"). After deciding that Welles's voice would be too recognizable, he cast the lesser - known James Earl Jones instead . Jones initially felt his contributions to the films were too small to warrant recognition and his role was uncredited at his request until the release of Return of the Jedi (1983). When Jones was specifically asked if he had supplied Vader's voice for Revenge of the Sith--either newly or from a previous recording--Jones answered, "You'd have to ask Lucas about that . I don't know". The character has also been voiced by Scott Lawrence and Matt Sloan for several video games . Hayden Christensen and Gene Bryant alternately portray Vader in Revenge of the Sith . During the production of Revenge of the Sith, Christensen asked Lucas if a special Vader suit could be constructed to fit his own body, rather than have a different actor don one of the original sets of Vader armor worn by Prowse . Brock Peters provided the voice of Darth Vader in the NPR / USC radio series . Both Spencer Wilding and Daniel Naprous portrayed Vader in Rogue One (2016), with Jones reprising his role as the character's voice . </P> <P> During production of Return of the Jedi, the casting crew sought an experienced actor for the role of Anakin Skywalker since his death was unquestionably the emotional climax of the film, and Sebastian Shaw was selected for the role . When Shaw arrived at the set for filming, he ran into his friend Ian McDiarmid, the actor playing the Emperor . When McDiarmid asked him what he was doing there, Shaw responded, "I don't know, dear boy, I think it's something to do with science - fiction ." His presence during the filming was kept secret from all but the minimum cast and crew, and Shaw was contractually obliged not to discuss any film secrets with anyone, even his family . The unmasking scene, directed by Richard Marquand, was filmed in one day and required only a few takes, with no alteration from the original dialogue . Lucas personally directed Shaw for his appearance in the final scene of the film, in which he is a Force Ghost of Anakin . Shaw's image in this scene was replaced with that of Christensen in the 2004 DVD release . This last attempt to tie the prequel and original trilogies together proved to be possibly the most controversial change in the Star Wars re-releases . Shaw received more fan mail and autograph requests from Return of the Jedi than he had for any role in the rest of his career . He later reflected that he very much enjoyed his experience filming for Return of the Jedi and expressed particular surprise that an action figure was made of him from the film . </P>

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