Tnx. I also did that (new instance, adjust exposure slider) but like I said: it
effected the whole image.
'First master the basics'… well… if the lines are too harsh, getting rid of
those is part of the basics as far as I'm concerned. Otherwise it doesn't look
like the masks aren't being mastered at all.
So yes, I get those basics, but like I said before: I don't get this to be
applied to my mask. That's why I asked about the blend mode before. I tried the
feather and blur and so on, but it doesn't work, because it starts wrong with
everything being applied to the complete image.
Hartelijke groet,
Hieke van Hoogdalem
Van: Terry Pinfold <terry.pinf...@utas.edu.au>
Datum: dinsdag 8 februari 2022 om 06:51
Aan: Hieke van Hoogdalem <hieke.vanhoogda...@gmail.com>, Remco Viëtor
<remco.vie...@wanadoo.fr>
CC: darktable forum <darktable-user@lists.darktable.org>
Onderwerp: Re: [darktable-user] Mask won't apply
Hi Hieke,
with respect I say that you seem confused about working with masks. I
hope the following explanation may help you.
I often want to brighten or darken a section of an image, similar to how I
would have dodged or burned in a traditional film darkroom. To achieve this
with a digital image I make a new instance of exposure and adjust the exposure
slider (sometimes I deliberately overdo the adjustment and will return to it
later). This adjustment moves the whole of the image's exposure, but then I use
the drawn mask option which looks like a crayon. I then often use the add path
option to very roughly select the area I want to apply the effect to. The
transition will be harsh and obvious. To fix this problem I then move the
feather radius and blurring radius sliders about a third of the way to the
right (amount may vary between images). This feathering and blurring then
creates an invisible transition. I return to the exposure slider and fine turn
the strength of the effect.
Forget the blend mode options until you have mastered basic masking techniques.
From: Hieke van Hoogdalem <hieke.vanhoogda...@gmail.com>
Sent: Tuesday, 8 February 2022 7:40 AM
To: Remco Viëtor <remco.vie...@wanadoo.fr>
Cc: darktable forum <darktable-user@lists.darktable.org>
Subject: Re: [darktable-user] Mask won't apply
The last image that needs a bit of tweaking is this one, because of the 2 very
white stripes in the left bottom. I wanted to make that part a little less
bright but I couldn't figure out how. The tone equalizer didn't help and the
filmic module is too hard to understand for me. I copied and pasted both the
image and the history so you get the context as well, for instance the
inversion. (See attached file.)
Kind regards,
Hieke van Hoogdalem
Op 07-02-2022 19:09 heeft Hieke van Hoogdalem <hieke.vanhoogda...@gmail.com>
geschreven:
Hi Remco,
Tnx. Yes I always check the dates of tutorials. This one was 2 years old so
I already expected some UI items to be different. I mainly followed this one
because he explains how to apply a mask including the use of the mouse. Where
to click etc. with free forms... I didn't manage to get that right before.
Thanks for the tips, I do work with scene referred RGB indeed. "Keep in
mind that in your case, masking and reducing exposition can lead to strange
tone transitions at the edges. That's why I suggested tone equaliser or filmic
adjustments instead of masking." Towing (?) the exposure down gave weird
results indeed. The tone equalizer was - almost - exactly what I needed. You
saved this image! Merci mille fois! Je t'embrasse tès fort et je te donne un
grand bisoux __
There are other images too though wich need a mask, but for several
different reasons. So I'm still looking for learning to work with masks. I have
until the end of this week - up until and including Thursday actually - for
making these changes and entering my pix for a contest.
And yes, I see the yellow part. What about it? __
Cordialement,
Hieke van Hoogdalem
Op 07-02-2022 18:38 heeft Remco Viëtor <remco.vie...@wanadoo.fr>
geschreven:
On lundi 7 février 2022 18:19:57 CET Hieke van Hoogdalem wrote:
> Hi there,
>
> I'm trying to apply masks. The idea is simple, but I can't get it
working. I
> searched for YouTube tutorials, but they don't cover my problem.
>(...)
> So here's the situation. I have this image that I had to brighten up
quite a
> bit, but now a small part is overexposed. I want to use a mask to
bring
> that down. But… when I draw a mask and change the exposure, it's being
> applied to the complete image. (Yes, I did create a new instance in
the
> expose module before I started to create the mask.)
If you are using the scene-referred workflow, you could use the tone
equaliser
for this (or perhaps adjust filmic).
As for the mask, did you visualise it ("circle in square" icon next to
"mask
refinement) and did it show the area you wanted to mask (yellow) ?
> I found this tutorial that showed something about 'blend mode' and
telling
> that 'normal' applies to the complete image. You have to chose
'mask'. But
> when I click on 'blend mode' I get a much larger list without the
option
> 'mask'.
I haven't seen a "mask" option in blendmode ever (that is, the last few
years). I found that I always have to check the date on any kind of
tutorial,
as changes are rather fast (not only for darktable) .
>
> What can I do to make this work?
First we have to know what went wrong...
Keep in mind that in your case, masking and reducing exposition can
lead to
strange tone transitions at the edges. That's why I suggested tone
equaliser
or filmic adjustments instead of masking.
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