It’s not the lighting that needs fixed. You need to reduce the amount of floor in front of the person so that green lighting isn’t reflecting up from the floor in front of them. Make the screen as short as you can, as narrow as you can and only have a couple of inches of floor in front in front of the feet. Then you remove most paths of green reflection from landing on any part of the person that is visible to the camera. Just makes sure you have green around the all of the edges of the person. Then the “clear area outside screen” settign in EZGS will remove those areas automatically.
See the video in the link.