The basic concept involves using a large green backdrop during filming, which is later replaced with anything you can think of, using chroma keying. For chroma keying to work, a green screen room must be flat and uniform, requiring careful lighting to ensure no shadows or detailing.

Other than the difference in technology, a 3D virtual studio has more technical features than a green screen studio as it allows the live streaming event to include stunning 3D virtual graphics to create the event more interesting because a green screen live streaming has replaced by green background to a computer- ...

Green screens allow you to film in a studio—or anywhere that allows for a solid-color background—and then add the background later. Chroma keying also enables creatives to more easily work around casting conflicts, such as when two major players can't be present at the same time.

Green screens are great for video, but for photography they aren't ideal. Video productions tend to have a lot more control. When green (or blue) screen is in use it impacts everything from the lighting and physical separation to the costuming and props.