Why I noticed the gamma shift issue when I started using this program for the first time in my life.
I liked some of the tools in it that Davinci Resolve doesn’t have. When you change hue/sat (color correction) and others. But I work with video sometimes and I needed some way to get the 3dlut files out as a result.
But this program doesn’t know how to export such options. But I remember doing the same thing with Lightroom - I took and applied effects to hald files, and converted the hald files themselves into 3dlut files and everything was fine. Considering that I also converted the gamma of the processed photo (tiff image from Davinci Resolve), because lightroom didn’t know what gamma some Davinci had. Gamma and color space. and then I imported into Adobe Lightroom, processed such an image and applied the effect to the hald file, and so on.
Such a conversion profile is not difficult to create and apply. I took a file, opened it in Photoshop and converted it with my profile. That is, I didn’t put it in Lightroom or anything else. So that the programs would open the photo as usual.
I did the same with Darkroom.
But! When I copied the created style of the program for hald and saved such a hald, I saw a lot of artifacts, when I already converted hald to 3dlut and applied such 3dlut to video in Davinci Resolve.
And then I found out that darktable applies some kind of sharpening to all the images and whatever else is out there.
I turned those effects off, leaving only what I needed. So I kept the style and applied it again.
It worked out great and more! - There was no gamma shift, but! I saw a staircase. As in gradients. staircase on objects where there are smooth transitions of light and shade.
When applying similar 3dlut files created in 3dlut Creator, or in Lightroom (hald > 3dlut with 3dlut creator) I never saw such treshold effects.
That’s when it became easy for me to save a normal image from the darkroom, not a hald. To make sure that this program saves everything correctly.
Seeing the problem, I started googling various resources. I came across this topic and decided to bring it up.