make mask from alpha
just been checking the after effects help file to generate a mask from alpha channels. i have a series of stills, a sequence of images actually, all of them have had the background removed in photoshop but the result wasn’t very good ,all the edges are jaggy. i have used autotres to generate the mask from the alpha, it works fine but i can’t apply mask expansion nor feather, i’ve converted all the keyframes to liner just to see if that way it would work but nothing.
can anyone tell me if it is posible to apply the expansion or feather please, the manual doesn’t actually say anything.
thank you very much.