Can a Style or Preset set only one parameter in the Filmic Module?

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Can a Style or Preset set only one parameter in the Filmic Module?

OlympusUser

I have a question on Filmic.
I would like to make a preset or style that has the "Lattitude" at 80% (instead of the default 50).
However, when I put that in a preset, the black- and white points are also stored in the preset.
When I apply the style, all those other parameters (which were fine at their 'auto' settins) are changed to the settings of that one image that I used to create the preset.

I just want to set the Lattitude. And leave the other parameters unchanged.
Is this possible?

jaw-dt

Maybe i'm missing something here but you should be able to create a preset of the filimic module with only the latitude changed. Start with a fresh image go directly to filmic and change only the latitude the select store preset the only change in filmic should be the latitude.

OlympusUser

jaw-dt As far as I can tell, using Preset or Style copies the values for black and white, not just the Lattitude.

It used to be similar in Lens correction and denoise where it would simply copy-past ALL values. This has thankfully been fixes a few years back, so the style/preset only applies usersettings and does not suddenly apply a different lens or ISO-profile.

Behaviour on Filmic seems to be similar to how these two modules behaved in the past. I will report it as a bug.

jaw-dt

This the behavior I would expect, all module parameters would be passed on changed or not in the preset. Please post the link to the bug report, would be interested in following it. Thanks.

OlympusUser

jaw-dt As I mentioned, it used to work like that in (among others) Lens correction and denoise, and that was completely useless.
Example: Suppose you wanted a denoise-preset with the Strength at 0.7 rather than the default of 1.0, to get a sharper image. If you applied this preset to all your images, it would also apply one fixed ISO-profile to all those images. If you created your preset on a 2000-iso image, all the images would get the 2000-ISO noise reduction profile. That was clearly wrong and it has been corrected.

Same is true here. You may prefer a different Lattitude or Contrast because those are matters of taste. But blackpoint and whitepoint depend on the image and you can not simply fix them at 3.0 and 7.0 for all images - that would be useless.

Link:
https://github.com/darktable-org/darktable/issues/12145
https://github.com/darktable-org/darktable/issues/8861

jaw-dt

Thanks for the links.