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Gradient keying

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Baard Kolstad
Gradient keying
on Dec 15, 2016 at 2:21:39 pm

Is there any way to key a gradient in after effects, so that it goes from 0% on one color to 100% on another color from an imported PNG? So in the middle of the shape it would be 50% opacity.

Here is an example of the shape I want to key:



And here is what I want to be able to do with it in AE:



Thanks in advance,
Baard


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Dave LaRonde
Re: Gradient keying
on Dec 15, 2016 at 3:52:21 pm

You can't key it effectively, but you CAN use AE's channels effects to create a matte which will do much the same thing.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Roei Tzoref
Re: Gradient keying
on Dec 15, 2016 at 7:54:06 pm

[Baard Kolstad] "Is there any way to key a gradient in after effects, so that it goes from 0% on one color to 100% on another color from an imported PNG? So in the middle of the shape it would be 50% opacity. "

you can create a luma matte out of this layer. apply the black and white effect and adjust the parameters until you get this:


now the original image can use this layer as a luma matte. the white will be opaque, the black will be transparent


Roei Tzoref
After Effects Artist & Instructor
♫ Ae Blues Tutorials


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Baard Kolstad
Re: Gradient keying
on Dec 16, 2016 at 8:28:49 am

Thanks for your reply Roei! Can't believe I didn't think of this. This solution should work, thanks!


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