MGM had originally planned to incorporate a "stencil printing" process when Dorothy runs to open the farmhouse door before the film switches to Technicolor; each frame was to be hand-tinted to keep the inside of the door in sepia tone. This process-cumbersome, expensive, and ineffective-was abandoned in favor of a simpler and more clever alternative (a variation of this process was used, however, in 1939 release prints of The Women (1939)). The inside of the farmhouse was painted sepia, and the Dorothy who opens the door from the inside is not Judy Garland but her stand-in wearing a sepia-rinsed version of the famous gingham dress. Once the door is opened and the camera advances through it, Garland (wearing her bright blue dress) walks through the door and the audience is none the wiser. This effect does not work on older video/TV prints where the Kansas scenes appear in true black and white, as the changeover to color is all too apparent. With the Kansas scenes returned to their original sepia tints, however, they closely match the magical opening door and the effect is powerful.
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