It happens with some images to have some (dark) defects on the bottom (and only on the bottom).
Changing the size of the display changes the defect (as attached images).
On the exported image I’ve still some defects, just a bit different.
The upper left preview seems not to be affected.
For base curve I use Nikon D750 plus fusion (per default settings 1 and 1).
Has anyone experienced this ?
Any idea about the cause … and remedy ?
Windows 10 + darktable 2.4.2 (but I’ve seen similar effects with 2.4.1 and another plugin but I don’t remember which one, lowpass maybe ?)