barnold84 Posted May 23, 2022 Share Posted May 23, 2022 Hello, I'm not sure, if my inquiry is placed correctly here but let me try. I'm doing astrophotography and usually any misses in the correct black point are becoming quickly obvious. I have two computers. System A is a desktop computer with Windows 11. Monitor is color calibrated. I'm doing some image editing in PixInsight and then switch to Affinity Photo. Images are 32-bit floating point tiff. System B is a macbook Pro with external Monitor (the same device as for system A) both displays color calibrated with the same tool (Spyder X Pro). Following problem. On System A, the images in PixInsight (left) and Affinity Photo (32bit with ICC Color Transform enabled) appear absolutely identical: On macos, the images look different (Affinity left, PixInsight right). The background has much more contrast. The settings for both applications on both systems are identical! If I export the image from Affinity on macos and watch it with the preview application, it appears like in Affinity Photo. Obviously, the blackpoint on macos looks darker. Somehow, there is something wrong. I should say that the black point for PixInsight remains constant across systems, while for Affinity it changes. To me, it seems that something is flawed on the macOS side. Has anyone noted the same issue? My impression is that the color management on macOS has an issue and Affinity relies on it. If I can provide further info, please let me know. As far as I can say: working with Affinity on macOS is a no-go for this case as for this type of photography, the background becomes way too noisy. I need to work on the Windows machine to achieve consistent results between different applications. Björn Quote Link to comment Share on other sites More sharing options...
Staff stokerg Posted May 24, 2022 Staff Share Posted May 24, 2022 Hi @barnold84, Could you upload the images you are using to our Dropbox here and i'll see if i can replicate the issue. I know we have a few Astrophotography users on MacOS who haven't reported anything like this that i can see. Quote Link to comment Share on other sites More sharing options...
barnold84 Posted May 24, 2022 Author Share Posted May 24, 2022 Hello @stokerg, I've uploaded a sample file (tif, 32bit floating point - behaviour remains the same if I'd convert to 16 bit) + comparison screenshots on the different platforms and monitors for this very file. Let me know how it goes. Quote Link to comment Share on other sites More sharing options...
barnold84 Posted May 26, 2022 Author Share Posted May 26, 2022 On 5/24/2022 at 3:09 PM, stokerg said: Hi @barnold84, Could you upload the images you are using to our Dropbox here and i'll see if i can replicate the issue. I know we have a few Astrophotography users on MacOS who haven't reported anything like this that i can see. @stokerg, did you receive the data and had a chance to take a first look? Björn Quote Link to comment Share on other sites More sharing options...
Staff stokerg Posted May 26, 2022 Staff Share Posted May 26, 2022 Hi @barnold84, 9 minutes ago, barnold84 said: did you receive the data and had a chance to take a first look? Yup i've got the files. I'm just waiting on comment from one of our experts on what exactly is happening here, mainly if its MacOS or Affinity that has the issue or if it could be something else. I'll update here as soon as i know more Quote Link to comment Share on other sites More sharing options...
barnold84 Posted May 29, 2022 Author Share Posted May 29, 2022 Hi @stokerg, I am curious to learn what your expert is going to find out. Was he at least able to replicate the issue? Björn Quote Link to comment Share on other sites More sharing options...
barnold84 Posted June 12, 2022 Author Share Posted June 12, 2022 Hello @stokerg, Do you have any news on the issue? I have to say that this inconsistency of luminance representation renders Affinity unusable on macOS for the desired purpose as the quality of the images is significantly different on the systems. Björn Quote Link to comment Share on other sites More sharing options...
barnold84 Posted June 27, 2022 Author Share Posted June 27, 2022 Hello, Would it be possible to get any update? Thank you! Quote Link to comment Share on other sites More sharing options...
barnold84 Posted July 16, 2022 Author Share Posted July 16, 2022 As it appears to me, customer support has checked out. Therefore, if any user has the same issue, it seems that there's a bug in macOS https://discussions.apple.com/thread/7411978?answerId=29674571022#29674571022 Quote Link to comment Share on other sites More sharing options...
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