Alright, once again I’ve come across this issue of having artefacts with my drone DNG files in Darktable. The first time it was Inspire 1 v2 and HDRHerge creating some OpcodeList1 FixBadPixels metadata (more on that here)
Now there are plain DNG photos just as the drone shot them. So no processing of any kind has been done in any external software.
Those artefacts are all over the image. Expand the photos so you can see what I’m talking about.
This is what the issue looks like in Darktable and RawTherapee:
Here is the raw file:
DJI_0004.DNG (17.7 MB)
Here is the drone generated JPEG of the same photo (no artefacts at all):