One of the biggest arguments for using green screens for filmmaking is the ability to create a natural environment without a large budget or set. Green screens are particularly useful for movie production because they can give filmmakers the freedom to shoot any scene anywhere they want, and they can create effects that rival anything a Hollywood studio can create on a much smaller budget. When using green screens, you must be sure to ensure that the lights are evenly spread out across the entire backdrop and avoid spilling green on the actors.
The biggest disadvantage of using green screens is the fact that they are not real people, and so have to be a different colour. The reason green is so unnatural is that no human is green, and it’s impossible to make people look green in a film. Green screens are often used to create a green background, as people aren’t green. However, while green is the most natural colour for a green screen, blue is the safest option for shooting subjects with a predominantly green colour.
Another problem with green screens is the difficulty of keying. If you don’t have the experience of keying a shot with green and blue, you may be better off using matte screens. In this case, you might not be able to key out the actors or the background, and the best option may be to change the shot entirely. The same problem can also arise when you want to key out a shot with green and blue, but there are ways to avoid this problem.