Sempervivum Posted September 6, 2023 Share Posted September 6, 2023 Dear fans of Affinity, today I encountered an issue similar to this one: I attach the JPG file in question. You can download the afphoto file from here: https://ulrichbangert.de/div/affinity/151-160_flat_2_denoised_Topaz_cropped.afphoto In the JPG export the tail of the comet is not visible completely. I fiddled a lot with modifying the color profile, which was successful for my previous issue but no success. Best regards, Ulrich PS: I exported to PNG, TIFF8, TIFF 16 either but the result is the same. Quote Link to comment Share on other sites More sharing options...
NotMyFault Posted September 6, 2023 Share Posted September 6, 2023 I can’t spot any relevant difference between the afphoto file and the uploaded image file, neither visually nor numerically (pasting in the jpg, using blend mode difference and a levels adjustment with white level 4%. The adjustments you added all reduce the visibility of the tail, it becomes so dark that it becomes very difficult to see in all versions. stokerg 1 Quote Mac mini M1 A2348 | Windows 10 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. My posts focus on technical aspects and leave out most of social grease like „maybe“, „in my opinion“, „I might be wrong“ etc. just add copy/paste all these softeners from this signature to make reading more comfortable for you. Otherwise I’m a fine person which respects you and everyone and wants to be respected. Link to comment Share on other sites More sharing options...
NotMyFault Posted September 6, 2023 Share Posted September 6, 2023 Left afphoto, right jpg. Both boosted 10x in brightness. Quote Mac mini M1 A2348 | Windows 10 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. My posts focus on technical aspects and leave out most of social grease like „maybe“, „in my opinion“, „I might be wrong“ etc. just add copy/paste all these softeners from this signature to make reading more comfortable for you. Otherwise I’m a fine person which respects you and everyone and wants to be respected. Link to comment Share on other sites More sharing options...
Staff stokerg Posted September 6, 2023 Staff Share Posted September 6, 2023 Hi @Sempervivum, I'm also not seeing a difference here. The export matches the image in Affinity. Quote Link to comment Share on other sites More sharing options...
Sempervivum Posted September 6, 2023 Author Share Posted September 6, 2023 Thanks to all for looking into. The situation seems to be similar to that in my other issue: It depends on the viewer. When opening both images in AP they look identically. However in the viewer of Directory Opus it's a bit different, darker and the tail shorter and more narrow. I attach a screenshot, left AP, right Directory Opus. In Irfan View it's the same. Quote Link to comment Share on other sites More sharing options...
NotMyFault Posted September 6, 2023 Share Posted September 6, 2023 Well, some viewers don’t handle color profiles correctly. There is nothing what Affinity can do to fix bugs in other vendors (or free) software. Quote Mac mini M1 A2348 | Windows 10 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. My posts focus on technical aspects and leave out most of social grease like „maybe“, „in my opinion“, „I might be wrong“ etc. just add copy/paste all these softeners from this signature to make reading more comfortable for you. Otherwise I’m a fine person which respects you and everyone and wants to be respected. Link to comment Share on other sites More sharing options...
Sempervivum Posted September 30, 2023 Author Share Posted September 30, 2023 Quote There is nothing what Affinity can do to fix bugs in other vendors (or free) software. "Not my business" - that's poor support. Take a look at the thread I referenced in my initial posting. The support of Photomatix was excellent. They didn't write "not my business" although the issue was not located in Photomatix. Instead they analyzed the issue carefully, analyzed my images and even used Affinity Photo. That's support how it should be. emmrecs01 1 Quote Link to comment Share on other sites More sharing options...
NotMyFault Posted September 30, 2023 Share Posted September 30, 2023 To avoid any misunderstanding: I’m not speaking for Serif/Affinity. Just a regular user. So stepping out of this thread and leave it to @stokerg to answer. Quote Mac mini M1 A2348 | Windows 10 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. My posts focus on technical aspects and leave out most of social grease like „maybe“, „in my opinion“, „I might be wrong“ etc. just add copy/paste all these softeners from this signature to make reading more comfortable for you. Otherwise I’m a fine person which respects you and everyone and wants to be respected. Link to comment Share on other sites More sharing options...
Sempervivum Posted January 21 Author Share Posted January 21 There is a new aspect regarding this issue: When preparing another image, the issue is visible more clearly and even in Affinity Photo itself, take a look at the attachment. Left is the image in AP. I exported it in TIFF format and loaded it into AP either to the right side. The stars in the export are not as bright as in the original. Is there a handling error on my side? IMO the export is independent of layers being selected and should include all adjustments being active. Original AP file here: https://ulrichbangert.de/div/affinity/P1201981.afphoto Quote Link to comment Share on other sites More sharing options...
NotMyFault Posted January 21 Share Posted January 21 the differences are only visible when zoomed out (40% in my case when showing the complete image). You must zoom to exactly 100% to compare images. Otherwise mipmap rendering and alias settings will cause rendering artefacts especially for small details like stars. Small details are exaggerated when zoomed out. This affects starts in your case, or any added noise or sharpening. When you zoom to 100%, both images are rendered identically. Quote Mac mini M1 A2348 | Windows 10 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. My posts focus on technical aspects and leave out most of social grease like „maybe“, „in my opinion“, „I might be wrong“ etc. just add copy/paste all these softeners from this signature to make reading more comfortable for you. Otherwise I’m a fine person which respects you and everyone and wants to be respected. Link to comment Share on other sites More sharing options...
Sempervivum Posted February 9 Author Share Posted February 9 Update: In the meantime it came across my mind that this issue might be caused by the color profile and this assumption turned out to be true: When I select the profile "sRGB IEC 61966-2.1" when exporting, there is no difference in the lightness. Best regards, Ulrich The difference is visible clearly when loading both images in AP and switching the tabs. Quote Link to comment Share on other sites More sharing options...
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