The green screen effect is a type of chroma key. The idea is to create a pure green background which is then replaced with whatever background image you want.

This tutorial shows you how to set up a green screen (cheaply if necessary) and how to use it in your video productions. The tutorial includes:
  • Planning the studio setting
  • Green screen material
  • Lighting the green screen
  • Incorporating green screen footage into your videos
  • More Tips
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