Hi. I have a clip of some art works on a wall. The clip is moving from right to left showing the art work. I want to change the colors of one of the art works. I have some key points with different color settings, but when i do that it of course applies to the whole picture. How can I make an effect to only apply to certain area, if that area is moving. Should I motion track and mask? I'm very new to After Effects so if anyone could dummy this out, it would be great.
Best regards
Charlotte