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Alpha renders look jagged
Hi,
I’ve got some graphics made in AE rendered to Quicktime with the animation codec. The graphics have an alpha channel that needs to be preserved for compositing with live footage in FCP. The problem is that my renders look great when viewed in QT but in FCP they look bad. The edges get jagged the entire graphic looks unsharp. I’ve tried renders with other codecs like PNG and uncompressed with the same issues. Im editing in a ProRes HQ sequence in FCP. Im not shure if this is an FCP or AE issue, thats why im doubble-posting.
Any ideas?
Im using:
Adobe After Effects CS3
Final Cut Pro 6.0.4
Quicktime 7.5.0/Victor Köhler
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4 Replies
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Make sure you are using “straight” alphas rather than “pre-multiplied” alphas in your renders.
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Also, make sure you are probably interpreting the alpha channel once you bring it into Final Cut.
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I meant “properly interpreting”
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Now it works! My animation codec still looks bad but when i rendered it as a PNG sequence with pre-multiplied alpha and set the alpha interpretation in FCP to black it turned out very nice! Thanks for the help guys!
/victor Köhler
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