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ProRez 422 doesn't support transparency, never has. You'll have to render rgb+Alpha and use ProRez4444.
I rendered it to RGB+Alpha and set it to ProRes4444 and it still does not knockout the black background. I tried this about 6 times and it's still not working. Is there another setting somewhere that needs to be set? Maybe does the Output color depth have to match the project color depth? If that's the case, I really don't know what to set it at...
First of all, what version of AE and are you up to date? Secondly, how are you checking the alpha channel. Try bringing the render back into ae to check. There was a bug, now fixed, in earlier versions.
Of course I'm new at After Effects so I'm still feeling my way around.
I toggled the transparency grid button, (just found it) and the background stayed black. I made another comp and this time it went from black to checkerboard. Rendered it and dropped it into FCP X and it's fine. Just to follow up, I have version 10.5.1 Thanks fro your help, Rick.
I toggled the transparency grid button, (just found it) and the background stayed black.
That's a sure indicator you don't have transparency. It sounds like there's a black solid in your comp, and you have to tend to it. Are you using AE's Lens Flare, perhaps?
Dave LaRonde wrote:
Are you using AE's Lens Flare, perhaps?
I wasn't using anything like that. Just working with text and adding some animation. Not sure where I went wrong but at least now I know how to check for it.