Hasta La Motion!

How does one go about despilling a greenscreen element using a defocused BG, besides running it through a certain keyer? Is this possible.. (without gizmo’s would be nice, seeing the school has strict limitations on folder permissions).

Right now, I’m using IBK to pull a edge key and 2 keylights for a core/garbage matte. I then copy the final matte back into a hue-corrected plate, but as usual, when I merge A over B I get a slight grey edge. Not always a fan of just eroding and adding a little blur, so I was just looking for a possible better approach.

My professor takes the final matte and copys it into a keylight comp over a defocused BG and premults it. Is this common? (calls it his despill lightwrap trick)

Appreciate it..
Steve