Oh, I totally forgot about this post but since someone revived it I must say that maybe I have another idea for it.
If you’re really crazy, you could try using viewportframes, so you can create 2 copies of what’s the camera seeing and then change the viewport colors to red and green and modify them.
Not really sure if I explained myself but otherwise, here’s a pretty useful module for viewport creation that comes with an example of how to capture an image in-game by using viewportframes.