Hi! I’m not a darktable newbie, but I’m not very good with it either. I have a couple of dozen pictures from a vacation where the sky is very overcast (raining at times) and blends in with the snowy mountains. IMG_3379.jpg is more or less what I would like the final product to look like, except I’d like to have more contrast between the clouds and the mountains.
I know there is some contrast to be had since if I stretch the image like crazy (at the expense of the rest of the image), there is clearly a good border between them (IMG_3379_stretched.jpg).
So, what I’m really after: increase the contrast between the sky and the snow.
I thought I might use darktable to select the sky with a parametric mask, then simply drop the exposure level on the sky to make it a bit darker. However, there is enough of a gradient in the sky that I can never separate the sky from the snow. I have not found a way to select a region by edge fitting (as in GIMP), but such a manual solution would not be ideal anyway since I would like to do this to several dozen photos.
Any suggestions for how I might tackle this? Either through masking or some other approach entirely? I can upload the raw (Canon 6D) upon request.
Thanks for any insight.