This video shows how to use a green screen and to ass effects.
You will need to place you green screen in the place where your film or photo shoot will take place. to do this you will need put your screen on a stand and hang it from a pole which goes from the two side poles. This will help your green screen be stable.
1. Make sure you are standing away from the screen so that any light will not create a shadow onto the screen. make sure that you create an even tone of light on the green screen. If a green screen is lit too brightly or the person is too close to the screen, you risk the green color reflecting off the screen and spilling onto the person. The spill color, which could end up on clothes or the side of your face, is the same color as the screen, when you key the screen, the spill area will be keyed out as well.
- To prevent a flat effect, place at least two lights slightly above head height, pointing downward onto you. Of these two lights, one light should be half as bright as the other.
- To create a clear distinction between the background screen and the foreground person, you need a back light. This third light should be small, bright, and narrowly focused at an angle so that it hits the back of your head and shoulders. The background should be equal to the exposure of the person. The back light should be brighter so that it is visible above the lighting of the other elements. With you well lit, you can more easily get an exact edge to you.
- With your lighting set up, you’re ready to find the right camera angle and start recording.
http://www.adobe.com/designcenter/premiere/articles/ppro15sdgrnscren.html
