I rotoscoped a bit of footage to mask out a person, and it seems to work except that part of my arm is transparent (right arm in the photo) where you can see rendered stuff. My node tree is also included, is there any way to stop this?
The “Factor” of your Alpha Over node is .993, not 1.0. That’s a small difference but I think it’s enough to make your person visibly transparent. Turn it up to 1.0!
I’m so blind thank you!