Re: [Gimp-user] from the shadows . . .

[Ofnuts <ofnuts gmx com>]

On 6/29/19 6:19 PM, dep wrote:
> greetings, everybody.
>
> one of the things i've long hoped for, that photoshop has had and gimp
> hadn't but now does in 2.10.x, is the highlight/shadow controls.
>
> but i'm a bit puzzled by one aspect, and i'm hoping someone here can help
> me sort what i'm getting wrong.
>
> when i use the shadow control to bring detail out of the muck, past a
> certain point it also adds blotchiness to areas such as the sky. should i
> try to generally select the areas i want to de-shadow, or is there some
> other control or setting that will help with this? the three sliders at
> the bottom of the control, white point, radius, and compress, are not
> particularly intuitive to me, but i'm guessing some relief might be found
> there.
>
> i suppose i could experiment, but i thought if the answer is known and
> simple i needn't try to discover it.
>
> thanks in advance.

The answer is luminosity masks:
https://patdavid.net/2013/11/getting-around-in-gimp-luminosity-masks.html

Basically, you make selections where the selection amount on a given
pixel is proportional to the closeness of the pixel's luminosity to the
range of luminosity you want to process.