The film was originally released in the United States under the title Stairway to Heaven, which derived from the film's most prominent special effect: a broad escalator linking Earth to the afterlife. The decision to film the scenes of the Other World in black and white added to the complications. They were filmed in Three-strip Technicolor, but colour was not added during printing, giving a pearly hue to the black-and-white shots, a process cited in the screen credits as "Colour and Dye-Monochrome Processed in Technicolor". This reversed the effect in "The Wizard of Oz". Photographic dissolves between "Technicolor Dye-Monochrome" (the Other World) and Three-Strip Technicolor (Earth) are used several times during the film.