rgb curve — buggy preservation of color?

Software darktable
1

When using rgb curve in 5.2.0 i notice no difference at all between the different “preserve color” modes in the rgb curve module. Historically there has been big difference between “luminance” and “none”. Now there’s no difference. It seems it’s permanently stuck in “none” despite what the setting says. Same with all the other options, they all look the same. I’ve tested it on a lot of pictures.

Anyone else experienced this?

2

I am on DT 5.3 Windows 11 and I do see a difference if I darken an image using RGB curve and switch between luminance and none.

2 Likes
3

Certainly not stuck for me at least…seems to be what I would have always expected…

Looking at the sky here…

2 Likes
4

Thanks both. I’ll do some further inspection before filing an issue.