You’ve might of heard of Green screen photo booths right? Whereby photos are taken against a special green backdrop and then the green is cut out and replaced by a specific visual still or video.
So reverse green screen is were we flip the green screen! So now rather than a green screen backdrop we use a white backdrop and green props or green cards. And yes you guessed it! Now anything that is green in the photo will take on the image or video, creating an entire new magic affect, Tah-da!