tga sequence - alphachannel


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tga sequence - alphachannel
by gunnar Kordestani on Feb 4, 2008 at 1:38:55 am

I try to find a workflow to transfer animated titles made in AE to use in dps Velocity. It seems that a tga sequence is a possible way.

To test it I just rendered one and reimported it in AE (as I dont have any dps here). The problem I have is that I never get any transparency. Always the title I did is rendered on the background color of the composition.

I chose "tga sequence", "RGB + Alpha" and "Premultiplied" as rendersettings.

whats the point in getting the result I want?

thanks ...Gunnar

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Re: tga sequence - alphachannel
by Aharon Rabinowitz on Feb 4, 2008 at 2:43:40 am

It sounds more like the program you are bringing it into (DPS Velocity) has the problem. Not AE. It should work exactly as you described.

Do the following to check:

Import your TGA sequence back into AE, and see if it has an al[ha channel.

If it does, the problem is with your DPS velocity. If not, you are doing something wrong in AE.

FYI - you are best to export with a Straight RGB, Not Premultiplied. Watch this video:

http://library.creativecow.net/articles/rabinowitz_aharon/straight_vs_premu...

Aharon Rabinowitz
Email: arabinowitz (AT) yahoo (DOT) com
All Bets Are Off Productions, Inc.
Creative Cow After Effect Podcast
Internet Killed the Video Star: A Guide to Creating Video for the Web

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Re: tga sequence - alphachannel
by Steve Roberts on Feb 4, 2008 at 4:08:38 am

In the Output Module, look for the "options" button when you choose TGA sequence. Then choose 32 bits, not 24.

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Re: tga sequence - alphachannel
by gunnar Kordestani on Feb 7, 2008 at 5:27:28 am

"32 bit" did what was missing. "premultiplied vs straight" is also good to know. thx both of you.... and see you next time.

gunnar

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