I'm asking this question for an editor friend of mine who uses AVID 5. We have a close up shot against green screen that we chroma keyed. What we want to do next is make the close up shot into a lower third graphic (which we did) but then add an opacity gradient, from left to right, and also a color to transparent overlay to THAT.
Problem is when we do it, it either affects the chroma key resulting in a matte around the subject, or it affects the entire screen.
Its my thinking that this is just something better suited for After Effects, but I thought AVID might have it built in somewhere as I think I can do this in FCP.