During the last years, there have been a massive use of green screen technology. Every day, spectators see green screens. On TV, for example, on the weather channel, series, in movies; every movie uses green screen. It allows production to cost less. Everyone can use those technics, as a Chroma key. It is a special effect technique for compositing two images based on color hues. It is a really easy process, with six major steps divide in two moments. During the production, thinking about your green screen, lighting and your digital camera will be necessary.