Ditto that Eric. You have to watch the rotobrush key spans pretty carefully. That was a big problem on a previous job. But now come to think of it we used a lot of keylight on that project as well.
Mike, I typically pull the key with keylight, set output as a matte, duplicate the layer and use it as a luma matte. This kills most noise and chatter. Maybe it would help with your frame issues?
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