I am trying to use open exr for export/import of height maps. I am exporting maps which have hundreds of thousands of unique height values.
I have tried exporting to openexr in several different existing applications such as: xnormal, photoshop, blender and using DevIl (image library). In all cases I end up with no more than a small handful of unique height values. Roughly 8000. If on the other hand I export to 16 bit png then I get roughly 65000. If I export as .raw I of course get all my hundreds of thousands of values. I have tried all the compression options for openexr. Lossy ones as well as non lossy ones. None of them are giving me more than roughly 8k unique heights. I don't know which version of openexr these tools would be using though it clearly wouldn't be the most recent version. That being said the fact that all 4 are showing me same behavior is leading me to suspect it's a problem with openexr lib or perhaps a former versions of openexr. Is this a known problem with openexr? Thanks, Morten.
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