Green Screen
Definition
A Green Screen is a large, uniformly colored green background used in film and video production to enable the Chroma Key compositing technique, in which the green background is digitally removed in post-production and replaced with a different image or environment. Green is the preferred color for most modern productions because digital camera sensors are most sensitive to green, making it easier to achieve a clean, accurate key. Blue screens are used when the subject is wearing green clothing or has green eyes. The term "green screen" is often used colloquially to refer to any virtual production technique.
Contextual Usage
The VFX supervisor briefs the crew before a green screen shoot: "We need to make sure the green screen is lit as evenly as possible — no hot spots, no shadows. Any unevenness in the lighting will create problems during the key in post. I also want to make sure there's no green spill on the actors — if the green light bounces off the screen and onto their faces, it will be very difficult to remove in compositing."
About this section
Production — or "principal photography" — is the phase in which the film or video is actually shot. It is the most visible and, typically, the most expensive phase of the entire process. Every day on ...
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