Also known as: グリーンバック, ブルーバック, クロマキー, 绿幕素材
The most common form (and color) of chroma key compositing, used in various film and picture media to help composite items into other scenes, usually by selecting the color and replacing it with the intended background.
While solid green is the most used color, any color with the same intent to help composite images can be used.