From BlenderWiki
Matting, Keying, and Compositing Tutorials
I'd like to thank Super Wu-man for allowing me to use his footage for the green screen tutorial as well as all of the guys at Detonation films ([1]) for allowing me to use their footage for the luminance key matting tutorial.
Tips for great green screen shots
Lighting is key. Try to light the screen and the foreground objects separately if possible. this will keep the green screen's color very uniform throughout the shot. Also when lighting the screen, make sure that light reflecting off the screen does not fall on the foreground objects (can be reduced later, but still doesn't help).
Definitions
- Special effects
- Special effects is an art that produces believable results of difficult or impossible images. Most special effects are done through a process called compositing.
- Compositing
- Compositing is the process of combining several images or stream of images (video) together to one image or stream of images. By cutting holes and placing the images over one another you can mask out pieces of one image and include pieces of another to get the result that you wouldn't otherwise be able to produce.
- Matte
- Black and/or white image(s) that when applied to another image determines where it is visible. The alpha channel.
- Key
- A color that is defined as transparent in an image. Green is the key in a green screen image so that anything colored green (the background) becomes transparent.
