So I recently got a green screen. I got the Chroma Key filter, and at first it worked pretty well, but then all of a sudden it started changing. This happened randomly, although it seemed to be more frequent when I moved around. Part of the screen wouldn't be keyed, or part of me would become keyed. I tried adjusting my lighting, messing with my settings, etc. It was really frustrating because it would bug out like this, then go back to normal so I couldn't figure out the problem. Please help! Thanks.