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Photoshop CC Uncompressed EXR File Size is Huge

Aug 27, 2013 7:33 PM

Tags: #file #size #cs #large #huge #exr #cc


I'm used to working with older versions of Photoshop CS, where I 'just save' exr with no options. This previously resulted in file sizes half that of .hdr. In this latest version if I choose to save uncompressed (which I assumed the old versions of Photoshop did?) the file size is a good 10x larger than they used to be. If I save as zlib or wavelet, they're similar size (a fair bit less than a .hdr).


What did the old Photoshop use for compression? Or how can I find out? I don't remember my old exrs taking so long to compress and save either (with zlib) but I might be wrong.


I'm not saving any transparency either (that I know of!).




  • Currently Being Moderated
    Aug 27, 2013 11:43 PM   in reply to BinarySpace

    It probably used the basic zips compression like 90% of all EXR implementations. Not sure, though. I prefer using TIFFs or PSDs directly for working on 3D rendered images, the rest I do elsewhere...



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    Aug 28, 2013 1:08 AM   in reply to BinarySpace

    Previously Photoshop always used the wavelet compressor for EXR.

    And Zlib can be very slow, and very data dependent.

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    Dec 2, 2013 6:58 AM   in reply to Chris Cox

    It's safe to say that PsCC doesn't have full support for EXR or partial support for EXR 2.0 ?

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