Blue screens are a cornerstone in film and video production. They create a solid, uniform background that can be easily separated from the subject during editing. By filming actors or objects against this backdrop, post-production teams have the capability to replace it with virtually any setting or visual effect.

Blue screen, or Chroma key in technical terms, is a type of special effects in video and TV production that allows producers to superimpose one image over another. This visual effect is often used for scenes with actors interacting with natural or constructed backgrounds that would otherwise be impossible or too costly to film on location.