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Extending backdrop in Post
I have a 9 foot wide white backdrop, If I do a wide shot and the side walls/ lights show in the shot, how would I duplicate the edge of the white to fill the sides. I am video taping a talent with green interactive computer and don’t have a blue screen to do chromakey (I only have green). Basically I am looking to do the opposite of what a garbage matte does and extend the white to clean the shot. I am using premiere pro and some after effects (beginner in AE). Thanks