If you tried to key on purple for example, anything blue and green would be subject to removal.

Only primary colors are used for keying, because they do not contain elements of any other color. For the rest of our time together we’re going to concentrate specifically on green screen materials, but extensive details on all things green screen can be found at Too Green or not too Green?

It sounds easy but there’s actually a good deal of both art and science behind it. This transparency can then be substituted with whatever is desired, real or imaginary. Once shooting is done, the image is taken into the edit system or green screen software, where the background color is targeted and removed, leaving a transparent area in its place. Anything that is to be rendered “invisible” must be colored and lit as close to the background as possible. The rules are simple: the subject must not contain any of the background color (green), must not be hit by any green light, and must never cross the edges of the green screen backdrop. Your foreground subject is then placed in front of this backdrop. A solid color is placed as a background and lit as evenly as possible. Let’s give a brief overview of how to use a green screen. Nevertheless the premise is the same, and that’s really what we’re concerned with. Technically this works slightly differently though, so the powers that be have given it a different name, luminance key. You can also use luminance to create this key effect, where anything over (or under) a specific brightness will be taken out. Red and blue work just as well under certain circumstances, but are usually avoided for reasons we’ll get into in a moment. To be more accurate, it’s called a chromakey, though green screen is used so often it’s used rather synonymously. There are many different ways you can make your own green screen.Īre you thinking of making a green screen? In this article, we will go over all the ways you can make a green screen and how you can do it.

Hanging translucent fabric on stage