You film against an evenly lit green background, then software removes the green using chroma key and drops in a new background.
Video Glossary
Green Screen
A green screen is a solid green background that can be replaced with any image or video in editing.
What is a green screen?
A green screen is a solid, evenly lit green background you film against so you can swap it for any image or video later. The technique behind the swap is called chroma key, which removes the green and drops in a new background.
How green screens work
Editing software identifies the green color and makes it transparent, revealing whatever you place behind the subject. Green is used because it differs most from human skin tones. Even lighting and avoiding green clothing are key to a clean result.
Why green screens matter
Green screens let you place a subject anywhere, from a branded set to a slide deck. They are widely used in tutorials, news, and presentations, and they give small teams a professional look without a physical studio.
Backgrounds without a green screen
You do not always need one. Many tools can replace or blur your background using software alone. Livestorm's virtual background library lets you set a clean, branded backdrop for webinars without any green screen at all.
Frequently Asked Questions
How does a green screen work?
Why is the screen green and not another color?
Green differs most from human skin tones, which makes it easier for software to remove cleanly. Blue is sometimes used as an alternative.
Do I need a green screen to change my background?
Not anymore. Many tools replace or blur your background with software alone. Livestorm's virtual background library (https://livestorm.co/virtual-background-library) sets a clean, branded backdrop with no green screen.
What do I need for a clean green screen effect?
Even lighting on the screen, no wrinkles or shadows, and avoiding green clothing so the software keys out only the background.
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