Dual ISO - massive dynamic range improvement (dual_iso.mo)

[Walter Schulz]

Try adding --force
and report back.

[Markelian]

Sorry for long reply. I tried playing around with settings now, including adding --force, but the effect is always the same.
Near the bottom of the export log it does say "horizontal stripe fix..." so i guess it is a known problem, just i guess doesn't fix it for my camera?

[Walter Schulz]

Check this file: https://uploadnow.io/f/Fm65nWd
Loaded your file in MLVapp and applied Dual-ISO setting, then exported.

[Markelian]

Very interesting, there the situation is reversed.
Basically no more lines in the sky area, but now the sealightpost and pier have the lines.
I thought maybe it was lightroom being like that, but opened now in every image viewing program i could find and it always renders like that.
Is it like that for you?
https://i.imgur.com/QPdELGT.png

[Markelian]

Another thing, sometimes there's also a color chroma line issue thing:

https://i.imgur.com/eoFYd7K.png
source: https://uploadnow.io/f/vW0W4bg (original, converted, and conversion log)

[Walter Schulz]

Had to add 5x5 smoothing to get rid of artifacts.

[Walter Schulz]

I suppose we have a purple fringing issue here. Happens in overexposed out-of focus areas.
Would require a second shot without Dual-ISO to verify/falsify.

[Markelian]

Yes, the 5x5 does seem to help it, thank you for the advice.
Yes there's a lot of fringing on those shot which i was wondering about too..
I tried to replicate it but now that i am home i can't get this behaviour to appear again in this form, at worst i just get normal CA's on high contrast edges (like bright background against dark foreground).