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Chroma key effects have more or less been used in filmmaking since the 1930s. While early technologies (and even computerized blue screen effects) might not have the same effect on us now as they did on audiences at the time, the process has basically remained the same. Now, in the age of digital workflows, the chroma key process has become accessible to anyone with a digital camera, some lights, a green or blue backdrop, and an editing software like After Effects.
Here’s a breakdown of the steps you’ll need to take and some tutorials to guide you through.