Alpha channel related export/import

hello
i have a shot in animation that has a flower bouquet wiping across he screen diagonally left to right
problem is there is no alpha channel attached so i cant see whats underneath when it wipes
do i have to:
import this into after effects - mask out everything but the bouquet
then export with alpha channel
then import into final cut
thanks
craig

it was created in Maya as a shot
i guess we either have to have the animator resend the Maya file with an alpha channel
All you need is the alpha version of the shot and run it in sync as a track matte. You don't the whole shot rendered again, you just need the grayscale/alpha/shadow pass, whatever it's called in Maya. However, are you sure you can't pull amatte from the shot as it is? Isn't it matted over superblack or does it have a premultipled matte/alpha?
bogiesan

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