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Exporting alpha in TGA

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Ayas Hassan
Exporting alpha in TGA
on Apr 29, 2006 at 10:23:52 am

I have a serious problem...

theres no alpha channel in TGAs that i exported from AE7
i used millions of color+
RGB+Alpha
Straight (unmatted)

i even tried changing th color setting to 16 bit and 32 bit...
i also hav quicktime full installed in my machine

can anyone solve my prob...

i used to xport alpha in AE6.5 with out any probs


thanx in advance

Ayas
Nirvana Digital Post FZ LLC
Dubai Media City


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Joe Chao
Re: Exporting alpha in TGA
on Apr 29, 2006 at 1:29:54 pm

U might have some layers which have not an alphe channel.Check the alphe channel of you comp in AE, and you might found it. Pay attention to these layers. For example, a solid layer with some light effects(such as "lans flare") on it ,and the transmode is "add" or "screen" or sth like that. these layers look like pictures with alphe channel, but in fact they don't.


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Ayas Hassan
Re: Exporting alpha in TGA
on Apr 30, 2006 at 5:38:03 am

thanx for th reply...

ther is alpha channel in my composition... i even tried it with only a text layer.. but theres no alpha coming in th render.. any ideas?

Ayas
Nirvana Digital Post FZ LLC
Dubai Media City


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Joe Chao
Re: Exporting alpha in TGA
on Apr 30, 2006 at 1:12:49 pm

Sorry, I should have found it yesterday.
here might be the problem:

"i used millions of color+
RGB+Alpha
Straight (unmatted)"

Straight (unmatted)???????
I think it should be "Premultiplied(Matted)":)


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Steve Roberts
Re: Exporting alpha in TGA
on Apr 30, 2006 at 1:45:48 pm

Not necessarily. Apps that can see alpha channels can usually see either straight or premultiplied.

Did you click "options" in the output module then select "32-bit", not 24-bit"?

If that doesn't work, which app are you viewing the TGAs in?


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Ayas Hassan
Re: Exporting alpha in TGA
on May 1, 2006 at 5:42:52 am

thanx steve..

i tried rendering in 32 bit ... but yet the same result
but this time am getting an alpha layer in th channels palette in photoshop.. but that alpha doesnt work..
i even tried using fcheck viewer that comes with MAYA..



Ayas
Nirvana Digital Post FZ LLC
Dubai Media City


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Allen Clements
Re: Exporting alpha in TGA
on Oct 12, 2010 at 5:31:30 pm

I am having the exact same problem. I'm trying to get a targa sequence with alpha into nuke. No amount of tweaking has helped. Was yours also with particular and a floor by any chance?


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Donutz Mar
Re: Exporting alpha in TGA
on Feb 26, 2015 at 4:16:35 pm

To export "*.tga" format with alpha channel you have to set your AfterFx project at 32 bit and set the render to:

-32 bit
-millions of color+
-RGB+Alpha
-Straight (unmatted).

If you open your tga in photoshop you can find your "alpha" in channel tab.
Create a selection of alpha channel with "ctrl+click" and apply it to your image in layers tab with "add vector mask".
I tried this in AdobeSuiteCC2014 and works well!

Good luck! :D


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