I found this tutotial : http://www.sigillarium.com/articles/labelExtractor_e.html
about using A label and coverage pass from maya and use it to mask every object you want in compo.
But the tutorial is based on SHAKE.
I try to do the same process in Fusion. I succeed to use the label pass, with a chanel boolean. then when i Check "use object" under the nuclear tab in each effect, i can apply an effect to only one of the object (its very very useful)
but, the edges are always bad, and to fix it i have to use the coverage pass, but whatever i try with it, i can't get this to work, the edges of the mask are always bad
do you know how to use the coverage pass with the label pass ?