In the Wizard of Oz, the shot of Dorothy walking towards and opening the door was filmed in color on a set painted sepia toned and the Dorothy stand in wearing sepia clothes and make up. After she opens the door she moves out of frame and Judy Garland wearing the regular Dorothy clothes moves into frame. The use of Technicolor, a color film technology, allowed the filmmakers to create the vibrant and colorful world of Oz. The transition from black and white to color was a groundbreaking visual effect at the time and added to the magical experience of the film.