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Create a mask based off of a key

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Billy Rodgeers
Create a mask based off of a key
on Aug 18, 2018 at 1:05:27 am

Is there any way for me to easily create a mask based off the results of a green screen key. I was hoping for this so that I don't have to make a mask and track it manually. Maybe is there some way to do it from an alpha channel?


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Greg Gesch
Re: Create a mask based off of a key
on Aug 18, 2018 at 1:57:15 am

Hi. What exactly are you trying to do - why make a mask?


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Billy Rodgeers
Re: Create a mask based off of a key
on Aug 18, 2018 at 1:59:42 am

It's entirely hypothetical, but if I would want to easily make a mask around something, it would be much easier just to do it based off a color selection right?


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Roei Tzoref
Re: Create a mask based off of a key
on Aug 18, 2018 at 8:02:08 pm

there's also layer-auto trace. you can create a mask based on alpha.
https://helpx.adobe.com/il_he/after-effects/using/creating-shapes-masks.htm...

Roei Tzoref
2D/VFX Generalist & Instructor
♫ AeBlues Tutorials ♫
http://www.tzoref.com


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Andrew Somers
Re: Create a mask based off of a key
on Aug 18, 2018 at 2:57:01 am

Animated masks are the realm of MOCHA. It's not uncommon to use Mocha for masks even when doing green screen.

But, do you specifically need a mask for something and you can't use the alpha channel?

Andrew Somers
VFX & Title Supervisor
http://www.GeneralTitles.com


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Billy Rodgeers
Re: Create a mask based off of a key
on Aug 18, 2018 at 3:04:48 am

No, I think you've answered my question. Thanks


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Steve Bentley
Re: Create a mask based off of a key
on Aug 18, 2018 at 7:38:03 pm

Don't forget you can follow a track with and move, rotate, whatever another turned off version of your keying layer - in effect it becomes and independent "mask".



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