To remove the color spill I recommended several things:
Decrease the intensity of the screen lights. In the past the keying software needed a much brighter screen to be accurate but it has improved dramatically. Less light on the screen means less bounce onto the subject. He was able to turn the LED panels down to 20% brightness and still get a great key.
Add a hair light behind the subject. We usually do this by placing it above and behind the screen although off to one side behind them will work, too. . Essentially you are “drowning out” the reflected green with white light. This brighter edge also provides nice separation between subject and background making them “pop” .
Increase the distance between the subject and the green screen. Farther the distance the weaker the reflected green light will be. Eight to ten feet should almost completely eliminate the problem. This is the cheapest and simplest solution if you have the space to work with. In this case he was only about four feet in front of the screen and the room size only permitted moving forward about a foot so he had to rely on the other two methods more.
Blond and white/gray hair reflects green more than other colors. If this is you you might consider using a blue screen instead. While the original green screen color was selected because it’s the least represented color in human skin tones blue is used if the subject has any green in it (or you need to wear green clothing) but has an added benefit of reflecting much less off blond and white hair.
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