 The larger the screen, the dimmer the picture.For this and other case-by-case reasons, the use of additive processes for theatrical motion pictures had been almost completely abandoned by the early 1940s, though additive color methods are employed by all the color video and computer display systems in common use today.The first practical subtractive color process was introduced by Kodak as "Kodachrome", a name recycled twenty years later for a very different and far better-known product.