I have finally caught the comet Neowise, after days of the overcast sky. However, due to light pollution and very faint visibility of the comet, I had to use very high ISO - 32000.
While I ended up catching it, I got some nasty blotchy sky in Darktable.
This is the best I came up with in terms of noise. However, magenta/green blotches are still visible. RT does the job better, but since I prefer DT’s workflow, can anyone point me in the right direction?
What modules are best to clean blotchy sky due to high iso? What do you use? Do you colorize the sky to even the discoloration? If so, which one?