27/07/2021 this is an older workshop I made on a different website – however, the technical flow is correct, so it i still usable.
I made a Workshop here, on how to install and how to use Luts (PNG) in RawTherapee :
Film Emulation / Simulation / HaldCluts or Luts are images in which a certain reference color profile is stored – the color profile can be applied to another image with one click
Important:
When applying a simulation in Rawtherapee, be it a preset, profile or Lut, always reset the processing drop down list to neutral – otherwise you will get a combination of different settings, and not the desired result.
How to use Luts in Rawtherapee ?
Open RawTherapee -> go to left side – below – preferences icon -> click to open -> in the next screen -> top left – second tab – image processing -> second below -> directories -> HaldClut directory -> go to folder on your computer where your HaldCluts are placed -> select -> open
-> Restart RawTherapee !
Then, open Rawtherapee again -> double click a picture in file browser -> the editor opens
In editor -> third icon on the right side, color -> scroll down to film simulation -> select a film simulation from the drop down list
Activate the film simulation
Or watch our instruction video on YouTube
In short :
“Go to a website to download Luts.
Save your download in the assigned folder, in this example : adapted camera workshop.
Extract the files in the folder.
When the files have been extracted, the HaldClut folder contains subfolders for color and black and white.
Start RawTherapee and open preferences by clicking the icon on the left side, second icon from below, kind of mixer icon.
In the preferences panel, click on theimage processing tab, top left, second tab from left – then click in directories – on Haldclut directory.
Go to the assigned folder – in this case : adapted camera workshop.
Select the extracted Haldclut folder and click open.
Close the preferences panel and close RawTherapee.
Restart RawTherapee double click on a picture to open in editor.
Click on the right side, top, third icon, color.
Scroll down to film simulation tab, activate by clicking the on/of icon.
Select a film simulation Lut from the drop down list.
Enjoy the applied film simulation ! Thanks for watching the Adapted Camera RawTherapee Film Simulation video.”
Open Source Photography 