oglu said: they are red cause there is only the red channel filled... use Photoshop and paint the red channel...
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I edit 32 bit HDR files all the time, but it's full color data (HDR panos for IBL).
What specifically are you trying to do, and what is the problem you're having?
use Photoshop and paint the red channel...
https://www.youtube.com/watch?v=o7AF302wdrM