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Max_Ramuschi
Max_Ramuschi
Known Participant
December 27, 2013

P: ICC Table Profiles clipped shadows under OSX

  • December 27, 2013
  • 166 replies
  • 3958 views

Hi, I've just found a really bad issue occurring in Lr 5 (but also in all other Lightroom versions) under Mac OSX 10.9 with a calibrated monitor: dark shadows (from a value of 20 to 0) are all clipped (pure black with no detail and no textures) while the histogram remains ok, indicating NO clipped shadows at all. This issue afflics also ACR.

Photoshop for now is the only software under MAC that reproduces dark shadows correctly: Library Module shows a bit darker and shifted shadows than Ps but acceptable, Develop Module is really bad showing brutally clipped shadows (but you work in the Develop Module right?!).

The same problem occurred also in OSX 10.8 but it was related only to LUT profiles, creating a Matrix based profile problems were solved.

Now the issue occurs with both Matrix and LUT profiles, v2 and v4. There's no apparent way to make Lr working right.

Under Windows no problems at all: Bridge, Photoshop, ACR, Lr (Library Module and Develop Module) show the same correct NOT clipped shadows.

I tested 8 different Mac running 10.9 with different GPU, different monitors, different profiling Softwares (Color Eyes Display Pro, Eizo Color Navigator, BasICC Color, i1 Profiler). Same results.
I tried to change the gamma value (2.2, sRGB, L*) problems remain. I tried to change ICC version (v2, v4) problems reamain. I tried to change profile type (LUT, MATRIX) problems remain.

How can a photographer work professionally on RAW images if shadows are bad reproduced?

Why Photoshop can reproduce shadows correctly while Lr isn't able to do that?

Why this happens only on a Mac enviroment?

Is Lr based on ColorSync (that can't handle profiles correctly) while Ps isn't (because it can handle and it has no problem)?

Please Adobe, FIX IT for all professional photographers, we can’t use Lr for serious works under Mac.

Max Ramuschi
Adobe Certified Expert

p.s.: Added a 100% Crop screenshots that shows the problem, some photos are even worse...

    This topic has been closed for replies.

    166 replies

    Show previous replies
    Max_Ramuschi
    Max_RamuschiAuthor
    Known Participant
    October 19, 2014
    I noticed precision problems related to certain GPUs in Photoshop color management. But I also noticed (in my case and few other) that if you set GPU to Basic in the performance tab will fix every issue. Can you confirm that?
    Max_Ramuschi
    Max_RamuschiAuthor
    Known Participant
    October 19, 2014
    Does Lr use GPU? I found the issue on every recent mac with every GPU (Intel HD 4000, Iris, Geforce, Radeon). Though I don't think it's a GPU related issue, I sent my GPU info.
    F
    FeedbackCommunityMember
    Inspiring
    October 19, 2014
    If LR is using the GPU for color management, then you probably also need information on the GPU in the system -- because we have seen precision problems with some GPU models and driver versions.
    Max_Ramuschi
    Max_RamuschiAuthor
    Known Participant
    October 19, 2014
    Done.
    J
    Community Expert
    Jao vdLCommunity Expert
    Community Expert
    October 19, 2014
    Same here. Glad to see you looking into it. It really doesn't matter at all what kind of profile you use. Every single Mavericks and Yosemite machine I tested has this problem regardless of the calibration device/settings used and this even happens with the built-in Apple profiles.
    F
    FeedbackCommunityMember
    Inspiring
    October 19, 2014
    Done! Thanks! 🙂
    MadManChan2000
    Adobe Employee
    MadManChan2000
    Adobe Employee
    October 19, 2014
    Massimiliano, Jao, and others experiencing this problem: Can you please send me your ICC display profiles? You can contact me at madmanchan@gmail.com. I'm assuming these are small enough to send by email, but you can also use a standard file transfer service if not.

    Yes, I can use my own matrix-based and LUT-based ICC profiles for development and testing, but it's always better to have the customers' profiles as well for our further verification.

    Thanks,
    Eric
    Max_Ramuschi
    Max_RamuschiAuthor
    Known Participant
    October 18, 2014
    Just to summarize and update the bugs list with Adobe products on OSX (Mavericks 10.9 and Yosemite 10.10):

    - With Matrix Based Profiles: Lightroom shadows are bad (darker, clipped with no details in Develop Module), Camera RAW and OSX (Preview) are ok.

    - With LUT Based Profiles (which are a reference point for professional users with pro displays): Lightroom shadows are worse (even darker and clipped in both Library and Develop), Camera RAW and OSX are bad (yes you've read right, the bad and clipped shadows issue occurs in Camera RAW too with LUT profiles and even OSX didn't fix the support for them).

    - On OSX, Photoshop is always right, perfect with both profiles.

    - On Windows, Lightroom and Photoshop are right, perfect with both profiles.

    Please focus on the LUT Profiles support as these are profiles that professionists normally use. (Eizo pro monitors perform way better with these kind of profiles for example).

    Tip: to see clearly the bug, calibrate your display with gamma 2.2 (which is the standard).

    You can download this image as a test image here: https://www.dropbox.com/s/e6sldv4l4s5..., but you can also use every image with a big dark shadows zone.

    Massimiliano Ramuschi
    Adobe Certified Expert Photoshop
    N
    nesys75
    Participating Frequently
    October 18, 2014
    Thank you Kelly, I really appreciate your help.
    Max_Ramuschi
    Max_RamuschiAuthor
    Known Participant
    October 18, 2014
    Hi kelly castro, I updated the bugs I noticed on Yosemite and Mavericks, so please read my last post. Thanks for your interest.
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