Haha, good one! That was unexpected. I know what it is, I’ll let people try to figure out it.
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Haze removal?
Edit: I just saw ingo’s comment, went to PR page and yes I was right 
In fact I’ve discovered it’s sort contrast boosting capabilities also and started to use it for some images without any haze.
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If you like haze removal, here’s one from ART (which should be easy to port back to RT) that improves its range of applications imho:
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standard mode (already in RT)
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new mode
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I already used it in ART. Using luminance mode too.
Haze removal is indeed a multi-purpose tool 
In your screenshot I can see “Film Grain” - sounds interesting too!
In another thread there has been much discussion about making RT more friendly to new users. While I am not a new user, I often have difficulty in understanding some of the references in this forum; please forgive my ignorance:
Why would you name a tool “Capture Sharpening” if it is implemented at the end of the processing chain. The name itself suggests it should be applied at the beginning.
Where do I find Nightly Builds?
And where your speedup-pr? Among nightly builds??
What is ART?
Again my apologies for being so dense.
P.S. Regarding the utility of this forum: In the thread “Local Lab Build” there are 810 replies in this thread. I am sure there is a wealth of useful information buried therein. Surely there must be a way to break this down to a more useable source.
The capture sharpening tool in RT is applied just after demosaic, which is very early, not at the end of the processing chain. I guess you confuse it with the old RL-sharpening, which indeed is applied at the very end of the chain.
ART is a recent fork of RawTherapee. Shares much of the same code but veered off into its own path
ART ist Another RT. It’s a fork by @agriggio. He aimes for example to simplify usage of RT, but we still collaborate (I already stole some ART dehaze code today for RT but also wrote some dehaze related code he also could (and will) use to improve ART. Means, it’s a good cooperation 
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Another 4-click processing:
The image shows a wild thyme captured in Provence shot using a Nikon D700 with an Ais 1.4/85mm lens at f2
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RT neutral profile
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RT neutral profile zoomed 1:1 to center:
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enabled dehaze
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enabled Auto-matched
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enabled Capture Sharpening
Not the greatest capture, but not to forget, it was at f2.0
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[quote=“mikesan, post:18, topic:14130, full:true”]
Where do I find Nightly Builds?[/quote]
This link has some:
https://keybase.pub/gaaned92/RTW64NightlyBuilds/
No idea if that link is good or not. Or here:
Unfortunately, zero information about package specifics.
The link to the rt-win64 repo is not the good one… the builds are copied to the official RT releases pages: https://github.com/Beep6581/RawTherapee/releases/tag/nightly
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Great, Wavelenh has now a 5.7 version!
BTW, I don’t want to derail the topic. Heckflosses 3-click shortcuts are great! I love the focus on the image! More of that please, preferably more as a tutorial and less of a game show 
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Thanks for your reply. I followed your link, but that just leads me to the Development Builds article in Rawpedia.
I should have been more specific. I am trying to track down the build cited in these posts:
Again thanks for your patience.
@mikesan A “PR” is a “pull request”, that is a proposal of change in the program’s code which can be accepted or not. If the PR is accepted, the new current code is updated but then you need to compile the code to get new feature/change in the program.
Edit: Ingo’s PR is still not accepted, so the current builds don’t have Ingo’s “dehaze speedup”.
I will accept it soon
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@mikesan For completeness: you can see all pull requests here: Pull requests · Beep6581/RawTherapee · GitHub – and in general you can track RT’s development from GitHub - Beep6581/RawTherapee: A powerful cross-platform raw photo processing program.