In this interview Alfred Hitchcock discusses why he wanted Salvador Dali to design the dream sequences for his 1945 film Spellbound.
Further contention was caused by the hiring of surrealist artist Salvador Dalí to conceive certain scenes of mental delusion. Hitchcock himself had very little to do with the actual filming of the dream sequence. Selznick thought that it was not Dalí’s fault, for his work was much finer and much better for the purpose than he ever thought it would be, and although much of Dalí’s work was used, one dream sequence depicting Bergman turning into a statue of the Roman goddess Diana was cut. Ingrid Bergman is quoted in the Hitchcock biography The Dark Side of Genius (1983) by Donald Spoto that the Dalí sequence ran for almost 20 minutes before it was cut by Selznick. The cut footage apparently no longer exists, although some production stills have survived in the Selznick archives. Eventually Selznick hired William Cameron Menzies, who had worked on Gone with the Wind, to oversee the set designs and to direct the sequence.
Wikipedia | Spellbound
Pre-production drawing of Salvador Dali’s dream sequence in “Spellbound”.