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I have a .hdr sequence as well as a .tga sequence. the .tga sequence contains the alpha channel to be used for the .hdr sequence.

The problem is that if I apply the alpha channel to my hdr sequence using Set Matte or Set Channel, then the color values of my hdr sequence get clamped to 0-1.

How can I mask my hdr sequence without losing the hdr range?

using After Effects CS5

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Okay, this tutorial answered my question and provides a workaround.

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Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference. Thank you! –  daviesgeek Apr 29 '12 at 4:04
    
I second the motion! –  Craig Mar 22 at 2:23
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