Luminosity Masks in darktable

Pat David has a great blog on photoediting in GIMP. I recently read his post on luminosity masks and was fairly impressed. Can darktable do something similar? Yes – they’re a special case of parametric masks. I thought I’d post a quick tutorial on luminosity masks using parametric masks. First, I strongly suggest you read Pat David’s post and thoroughly understand what’s going on. A quick and simplistic explanation follows: Normally, if we make a selection and, say, adjust the brightness dramatically in that selection, we get a sharp (and ugly) transition near the edge of the selection:
This is a companion discussion topic for the original entry at https://www.darktable.org/2015/01/luminosity-masks-in-darktable/
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Great stuff!

in applied the masks sequentially L, D, M and it seems to work.
(see: Luminosity Masks in darktable posted on Sun 18 January 2015 by Mueen Nawaz )

i used to do this in GIMP, but dt is easier.

i am familiar with
"Pat David has a great blog on photoediting in GIMP. I recently read his post on luminosity masks "

The original tutorial by Tony is here: Tony Kuyper’s Luminosity Masks Tutorial: Luminosity Masks ©2006 Tony Kuyper

L- D- and M-masks come from Gimp, where the stepless mask adjustment is difficult. I adjust parametric masks in Darktable steplessly according to the situation without the idea of L-D and M-masks.
Parametric masks can be made on many grounds, depending on which module you are using:

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