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A green screen is a substantial green backdrop added to a photograph to enable additional digital effects. The special effects team will use CGI (computer-generated imagery) or backdrop material known as "plates" in post-production to change the background from green to anything they desire. Depending on what needs to be altered, the background might either cover the full screen or only a section of it.
How Do Green Screens Operate?
Compositing, often known as chroma keying, involves stacking two pictures.
- In front of the green screen is the subject.
- CGI or special effects applied to a green screen.
When were Green screens first appeared ?
Chromatic keying and other special effects can feel smooth when utilised nowadays, but that was not always the case.
The first applications date back to 1898, when George Albert Smith used a black cloth to "disappear" items.
The Great Train Robbery may have been the earliest instance of note (1903). Here, the train windows were painted dark so that subsequent passing scenery could be added.
Early examples were frequently subdued but important historically. Other significant occasions in green screen history include:
- 1918 - Inventing the travelling matte method is Frank Williams. Although it was one of the first chroma keying video effects, they were still using black at this time.
- 1933 - The Invisible Man, released in 1933, makes use of the trick to make a man appear invisible.