I have a project where a small bit of my light came through the green screen (there was a window behind it). It's definitely blown out and to make matters worse, the talent is playing drums through that part, so it's not like I can do a quick and dirty with a mask. It's blown out at pure white. Is there a way I can take out that pure white with a luma key or something? Premiere pro cs6 using ultra key but I have access to after effects too.