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Background Transparancy?

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Chris Allen
Background Transparancy?
on Jan 22, 2008 at 5:56:48 am

Hello,

GREAT product! I've successfully learned many tricks and have been able to create a lot of stuff on my own... However, I am stuck on one particular problem.

I need to output my finished product (I prefer Targa Seq.), but I need my background to be transparent when I throw my sequence into AE. How do I go about making the background transparent, yet keep my emitters and effects?

Any help is grealty appreciated!

Thank you,
Chris


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Alan Lorence
Re: Background Transparancy?
on Jan 22, 2008 at 12:29:06 pm

Render just the particles with alpha (turn off bg in pIllusion and make sure "Save Alpha" is checked in output options). Then composite over background footage in AE.

Current versions of pIllusion create alpha channel for particles only, ignoring alpha of bg footage.



Alan.

http://www.wondertouch.com


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Chris Allen
Re: Background Transparancy?
on Jan 22, 2008 at 3:49:03 pm

Thank you, Alan!

Dumb question though... sorry. But where do I turn off the BG in PI?

Thank you!

Chris


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Alan Lorence
Re: Background Transparancy?
on Jan 22, 2008 at 4:54:09 pm

Click the "bg" icon in the layer window.



Alan.

http://www.wondertouch.com


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Chris Allen
Re: Background Transparancy?
on Jan 23, 2008 at 1:20:29 am

Thank you for your help!

Chris


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Hung Nguyen
Re: Background Transparancy?
on Jan 21, 2011 at 5:20:24 am

So I render just the particles in avi format using lagarith lossless codec with the save alpha checked and removed black bg from RGB channels both checked and unchecked and I still don't get the output avi with alpha channel but a black background. I must be missing something obvious.

Please advise
Thanks


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