The obvious groundbreaking achievement for The Wizard of Oz was that it was the first film to incorporate color during production. The use of color in movies added a new artistic element to the filmmaking process, as directors made stylistic choices to symbolize different aspects of characters or set the tone for certain scenes. However, this film’s Oscar winning effects also brought about a much more subtle evolution in a long-standing technique called the matte painting.
Matte paintings had been used since the early 1900s, but with the addition of color, they started to become more developed. A precursor to the green screen "digital mattes" we are accustomed to today, matte paintings were used to fill in parts of a scene’s environment. Enduring for several decades, they were used throughout the 1970s and 80s, blending in with the live action shots so well that even trained eyes couldn’t tell the difference.