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Alpha channel: objects borders problem
I have exported some frame with test objects from 3d studio max to AE in .tga format.
So there’s an alpha channel for the background enviroment.
In AE I tried to change the background according to the alpha channel.
Here you can see the result: https://f1.creativecow.net/1011/alpha-channel-objects-borders-artifacts
How can I remove that white-border artifact problem?
Please note that frames from MAX are taken using a moving camera and motion blur on (mental ray render engine).
Thank you
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4 Replies
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There’s two things I’d watch out for…
1. Partial transparency in the image premultiplied with the wrong color which means you’ll need to use the AE effect remove color matting.
2. Instead of tga,arg! use Tiff 16 bit trillions lzw off.
https://technicolorsoftware.hostzi.com/
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Fixed changing interpret footage to straight (it was premultiplied).
What about output format? Is it better exporting in .tiff then in .tga? What about .rpf? Does they all support alpha channels?
Thank you a lot!
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[Alberto Bedin] “What about output format? Is it better exporting in .tiff then in .tga? What about .rpf? Does they all support alpha channels?”
TIFF and TGA can both carry uncompressed RGBA, but as Chris mentioned, TGA can be touchy and TIFF supports higher bit-depths.
RPF is an option, and it can carry a lot more information from a 3D scene. See Import RLA or RPF data into a camera layer in the help.
Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
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I have just tried RPF instead of TGA and it’s really faster in AE preview. Also, as you said, I can control obj IDs from MAX and other things.
I will definetly use it in the future.
Thank you
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