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    $\begingroup$ A few incorrect statements in this post. First, "Raw" will not preserve any more data than any of the other formats as your file format and bit depth control that. That is purely the display transform by default. Second, Blender is already an HDR scene referred rendering system if one renders with Cycles, so Luminance could be entirely unnecessary here. Simply save the render as an EXR. $\endgroup$ Commented Nov 24, 2014 at 18:10
  • $\begingroup$ @TroySobotka Good point, could you add that as an edit. Thanks! $\endgroup$ Commented Nov 24, 2014 at 18:19
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    $\begingroup$ For completeness Blender now supports the export of the .hdr filetype. $\endgroup$ Commented Nov 20, 2015 at 12:32
  • $\begingroup$ @GiantCowFilms I am trying to save my rendering results in 16-bit PNG files. After loading the PNG files in Python I noticed that the highest number for all pixels is never more than 255 (8-bits). I posted a question here.I would appreciate if you can take a look and tell me if I'm doing anything wrong.I may note that I wanted to initially save my rendering results in OpenEXR but due to this issue,I cannot do this as of now. So I decided to continue with PNG to get some preliminary results until Blender people fix the OpenEXR bug $\endgroup$ Commented Mar 31, 2018 at 1:50