Green Screen

Chroma key compositing, or chroma keying, is a visual-effects and post-production technique for compositing (layering) two images or video streams together based on colour hues (chroma range). wikipedia

The technique has been used in many fields to remove a background from the subject of a photo or video – particularly the newscasting, motion picture, and video game industries. A colour range in the foreground footage is made transparent, allowing separately filmed background footage or a static image to be inserted into the scene. The chroma keying technique is commonly used in video production and post-production.

This technique is also referred to as colour keying, colour-separation overlay (CSO; primarily by the BBC), or by various terms for specific colour-related variants such as green screen or blue screen; chroma keying can be done with backgrounds of any colour that are uniform and distinct, but green and blue backgrounds are more commonly used because they differ most distinctly in hue from any human skin colour. No part of the subject being filmed or photographed may duplicate the colour used as the backing, or the part may be erroneously identified as part of the backing.

The practicality of green-screen compositing is demonstrated by actor Iman Crosson in a self-produced video. Top panel: A frame in a full-motion video shot in the actor's living room.

Bottom panel: The corresponding frame in the final version in which the actor impersonates Barack Obama "appearing" outside the White House's East Room.

Best Green Screens for Streamers page

How to Set Up Chroma Key Settings in OBS page

How to Light a Green Screen page

While your exact lighting rig will vary depending on several factors, here’s a diagram of the basic set-up you want for optimal chroma screen lighting. Notice the subject and screen are being lit separately.

Green Screen Lighting Setup Diagram • StudioBinder