@Ann Bens: I’m trying to mask part of a person’s body as they move. So something static won’t work. But you make me wonder if maybe Track Matte might have a way. That looks like a rabbit hole, but might be my only option. I’ll see what this can do.
Thank you, Jon. I’m going to try not to resort to that, since the clip was, otherwise, exactly on target. But, that solution is always waiting in the wings. :/