<p>Okay, <a href="http://www.fxguide.com/featured/After_Effects_32-bit_Workflow_In-Depth/" rel="nofollow">this tutorial</a> answered my question and provides a workaround.</p>

CC BY-SA 3.0
2012-04-29T04:04:39.813Z
Whilst this may theoretically answer the question, [it would be preferable](http://meta.stackexchange.com/q/8259) to include the essential parts of the answer here, and provide the link for reference. Thank you!
daviesgeek
CC BY-SA 3.0
2014-03-22T02:23:12.473Z
I second the motion!
Craig
CC BY-SA 3.0
2012-04-23T14:09:43.090Z
2012-04-30T13:31:16.540Z
2012-04-30T13:31:16.540Z
Mat
<p>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.</p>

<p>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.</p>

<p>How can I mask my hdr sequence without losing the hdr range?</p>

<p>using After Effects CS5</p>

<after-effects>
After Effects: Set Alpha/Matte to hdr layer without clamping the values to 0-1 range
Mat
# After Effects: Set Alpha/Matte to hdr layer without clamping the values to 0-1 range

(Asked by: username_0 on 2012-04-22)

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 username_0te 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

**Tags:** after-effects


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## 1 answers

### Answer by username_0 on 2012-04-23. Score: 1

Okay, [this tutorial](http://www.fxguide.com/featured/After_Effects_32-bit_Workflow_In-Depth/) answered my question and provides a workaround.

> **Comments:**
> **username_1**: Whilst this may theoretically answer the question, [it would be preferable](http://meta.stackexchange.com/q/8259) to include the essential parts of the answer here, and provide the link for reference. Thank you!  
> **username_2**: I second the motion!  

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