Shooting on green screen can really open up possibilities, for your film. Compositing your actors into scenes from other countries and other worlds.
For the low budget filmmaker, using one of these great little collapsible 5×7 green screens, it’s all fun and games, until you have to fold the green screen up.
Then, you feel the embarrassment of trying to get that huge screen, tucked back into that little bag. Well, here are some videos to help you avoid the cold sweat of your leading lady watching you act out a scene from a Jerry Lewis movie, trying to fold up the screen.
Wikipedia describes green screen compositing as:
Chroma key compositing, or chroma keying, is a special effects / post-production technique for compositing (layering) two images or video streams together based on color hues (chroma range). The technique has been used heavily in many fields to remove a background from the subject of a photo or video – particularly the newscasting, motion picture and videogame industries. A color range in the top layer is made transparent, revealing another image behind. The chroma keying technique is commonly used in video production and post-production. This technique is also referred to as color keying, colour-separation overlay (CSO; primarily by the BBC), or by various terms for specific color-related variants such as green screen, and blue screen – chroma keying can be done with backgrounds of any color that are uniform and distinct, but green and blue backgrounds are more commonly used because they differ most distinctly in hue from most human skin colors. No part of the subject being filmed or photographed may duplicate a color used in the background.
It is commonly used for weather forecast broadcasts, wherein a news presenter is usually seen standing in front of a large CGI map during live televisionnewscasts, though in actuality it is a large blue or green background. When using a blue screen, different weather maps are added on the parts of the image where the color is blue. If the news presenter wears blue clothes, his or her clothes will also be replaced with the background video. A complementary system is used for green screens. Chroma keying is also used in the entertainment industry for special effects in movies and videogames. The advanced state of the technology and much commercially available computer software, such as Final Cut Pro, Pinnacle Studio, Adobe After Effects, and dozens of other computer programs, makes it possible and relatively easy for the average home computer user to create videos using the “chromakey” function with easily affordable green screen or blue screen kits.[original research?]
OK, here’s the real video.