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expanding/generating effect over layer borders
im working on a big composition (just in size terms;) – 9 times 720 pixels in width) and i want to use a time blur effect on a single layer in the middle so that the effect gets generated outside the initial footage layer borders. so to speak let the filter generate extra pixels…without stretching the footage.
aspect ratio is somewhat like this (x=original footage/->where i want the effect to expand)
!—————————-!——-!—————————-!
!-<-------------<-------<--!---x---!->——->———–>—!
!—————————-!——-!—————————-!
i know how to do it in PS, but is it possible at all in AE?
any help would be much appreciated!
thanks