I am trying to key out the character so all that is left is his ground contact shadow. So I did a Alpha invert Matte on the beauty pass to cut out the character from the ambient Occlusion pass and then keyed it all onto a white solid. As you can see from my screen grab I am left with a fine hairline around the edge. What is the technique to remove this edge ?
I am guessing I should crush the levels on the Alpha of the layer I am using as a matte ? Is there a better approach ?