The full color image was the results of the
interference of the wavefronts of light from the one image upon the other. To deliberately produce this phenomena, just load a camera with a panchromatic, black and white transparency film. Panchromatic films render different colors as different shades of Grey. Place any color filter over the lens and take a properly exposed photograph of a colored scene. Then advance the film to the next frame, and place a different color filter over the lens and take a second properly exposed photograph from the same spot.