Mailing List AE-List@media-motion.tv ? Message #52262
From: Jance Allen <jance@janceallen.com>
Sender: Jance Allen <janceallen@gmail.com>
Subject: Re: [AE] compound choke?
Date: Tue, 24 Dec 2013 15:18:38 -0800
To: After Effects Mail List <AE-List@media-motion.tv>
Ah great!  Yep, shift the alpha to luma, do a compound blur, levels to "choke", then back to alpha.  Duh!

Thanks!

- Jance

On Dec 24, 2013, at 2:45 PM, Brian Maffitt <brian@totaltraining.com> wrote:

> Off the top of my head, you can use compound blur with your grayscale map controlling the blur… apply the blur to the alpha channel of the layer you want to choke, and then apply levels and adjust the alpha channel to force the choke. Essentially you’ll be doing what the choke filter does manually, but using a compound blur instead of the default fast blur (or gaussian or whatever is built into choke).
>
> Good luck,
> Brian
>
>> I need a compound matte choke effect, where the per-pixel choke is driven by a gradient (like compound blur).  Has anyone ever heard of that?  Is there anything I'm missing, or any workarounds?
>>
>> Thanks!
>>
>> - Jance
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