Seems pretty obvious but here are some pages with tips for Chroma Key lighting. The general tip is to evenly light the backdrop so there are no heavy dark areas that show as black on the video but don’t light the backdrop to heavily or you will get green bleed on the edges of your actor and possibly you will get white spots on the image.
As we know from our hours of work in post production on the Dialog Table those shadows are a killer.
John Jackman’s Green Screen Tips
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