16bit option for channel combiner effect?

[Todd Kopriva]

What exactly are you trying to accomplish? Other Channel effects (such as Calculations and Set Channels) do work in color depths of greater than 8 bpc.

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Todd Kopriva, Adobe Systems Incorporated
putting the ‘T’ back in ‘RTFM’ : After Effects Help on the Web
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[Antony Buonomo]

I have been given a lens flare shot on 2K film and I am trying to give it an alpha channel using the technique Ben Rollason has described in one of his tutorials. Basically Straight to Pre-multiplied/invert.

A

Vertigo Productions
https://www.vertigo.co.uk

[Todd Kopriva]

For that, you can use the Shift Channels effect instead of the Channel Combiner effect. There’s even a link on the “Shift Channels effect” page of After Effects Help that points to a blog post that explains how to do this.

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Todd Kopriva, Adobe Systems Incorporated
putting the ‘T’ back in ‘RTFM’ : After Effects Help on the Web
———————————————————————————————————
If a page of After Effects Help answers your question, please consider rating it. If you have a tip, technique, or link to share—or if there is something that you’d like to see added or improved—please leave a comment.