I’ve been reprocessing some old photos in PhotoLab 4 and having no problems except for one image. It looks fine inside PhotoLab but when I export it I get giant black stripes and a couple of odd artefacts which appear to be related to one of my uses of the Repair tool.
Here’s the photo in PhotoLab showing the Repair tool masks with the offending one selected.
This topic has come up several times from people who have made corrections, then made geometric changes. Apparently, repairs and local adjustments take the visible image as the source for their coordinates, not the original image.
Ok, geometric changes before repair I can see, but crop shouldn’t make a difference, unless cropping after a repair moves source areas outside of the crop, and that would be quite odd.
Then again, since source points can be moved, I wonder what the behaviour is if a crop boundary falls between a source and destination?
Yes, some repairs were done before the crop. But I turned off the repairs and still get the stripes. Surely with them turned off they should have no bearing on the output?
I think I’d rather DxO weigh in on this first. “Turning it off and on again” shouldn’t be required. I’ve processed 23 other photos from the same camera, all with DeepPRIME, and all of them are fine.
Have you set preferences to use a GPU? Some GPUs are not powerful enough and need to be turned off as explained in the notes in the preferences dialog.
Thanks, that does seem to be it. I had switched it to use my “partially supported” Intel UHD 630 integrated graphics as that turned out to be markedly faster than CPU on my Mac mini.
Switching it back to CPU cured the stripes and again switching to GPU brings them back. I had not read “stuttering and/or errors” to mean “corrupt output”. Live and learn I guess.
Hopefully the point will be moot when my M1-powered MacBook Pro arrives next month.