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Rendering Transparent backgrounds in After Effects

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Hannah Benbow
Rendering Transparent backgrounds in After Effects
on Dec 9, 2011 at 2:55:02 am

So I watched this tutorial on how to make a smoke effect, and I needed to export it for work. The catch was I couldn't get it to have a transparent backgroud, it was always a solid. I ended up doing a smoke animation in photoshop, but still want to see if I can export this animation with a transparent background so it can get overlayed onto something else.

What I did to make the smoke animation was...

Create a new solid layer (I'm thinking this is my problem..hence the word solid). Then I added particle playground and gave it a blur effect.

I've tried exporting it as an alpha png in render que, but it allways comes out as a solid.

Help? :)


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Brian Charles
Re: Rendering Transparent backgrounds in After Effects
on Dec 9, 2011 at 5:47:11 am

Did you render RGB + Alpha? or only Alpha?



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Hannah Benbow
Re: Rendering Transparent backgrounds in After Effects
on Dec 9, 2011 at 6:54:04 am

Yeah I've tried both, and both times its given me a solid background behind the smoke.

I've also in the composition mode I've changed it to alpha and turned on "Toggle Transparency Grid"

When I turn on "Toggle Transparency Grid" it shows the transparent background how I want...I just can't get it to render like that.


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Brian Charles
Re: Rendering Transparent backgrounds in After Effects
on Dec 9, 2011 at 1:45:57 pm

If you see the transparency grid then the render should be fine.

You won't see transparency until you composite the rendered with other footage either in After Effects or your NLE.



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