Darktable: compress history stack issue


(Gustavo Adolfo) #1

Hi,
On equalizer module, I loose the mix setting after I compress the history stack:
before compressing (mix value of 1.126):


after compressing (mix value resets to 1.0):

EDIT: I’m running DT version from here:
deb http://ppa.launchpad.net/pmjdebruijn/darktable-release/ubuntu bionic main


#2

That’s by design. The slider isn’t part of the stored settings. You will also lose it’s value when opening the image again later. The effect is kept though: it scales the actual curves.


(Gustavo Adolfo) #3

@houz What’s the rationale behind it? I mean, I can save the changes in other equalizer settings and when I open the image again I can proceed from where I left them. Why can’t I do the same with the mix setting?


#4

Moin, Grumpfchen & Bom dia, Rei!

One will also lose the value (without compressing the history stack) simply by selecting 0 - original and then select the top of history stack again.

/Claes


(Eduardo Battaglia) #5

The slider was added as a convenience tool to help you modify the strength of the effect. It is not a module parameter in itself; when you leave darkroom mode all changes will be consolidated into the spline curves.

From darktable’s manual.


(Gustavo Adolfo) #6

@everyone I got it, thanks. I was giving too much importance to that slider value, but what really matters is the curve. The slider is just a means to get a curve that fits my needs. Once I get that curve, it’s not important to save the old curve + slider value, just keep the resulting curve.