Chroma key screens display a chosen color as transparent. You can use these screens with what are commonly referred to as green-screen videos. For example, you can record a person against a solid color background, and then, when you play that video on a chroma key screen, they will appear as though they are standing in the environment.
Example video on chroma key screen (left) and standard screen (right)
Adding a chroma key screen to an experience
If the timeline view isn't active in the editor panel, select the timeline icon ().
From the panel on the left-hand side, select IFX.
From the library of IFX, select a screen that includes chroma key in its title.
Place the IFX in the environment. For more information about the controls that are available when you add an IFX, see Adding IFX.