Good question @sguyader, to be honest I’d forgotten about the DCP profiles in RT!
I just tried it out with the X100F profile from the Adobe DNG converter, and it did not work well with the HaldCLUTs - there was a definite colour shift which gave less accurate results than without the DCP applied.
So to answer your question, the simulation should be applied over a neutral profile with no DCP loaded. 
@arangast Really great!
Only a suggestion for the next release: could you please name Black and White Profiles with a leading BW and color ones with a leading colors, so that they will be better sorted (or put them in 2 separate directories)?
Also could you please specify under which license are they?
Thank you!
Thanks, I’ll try those one of these days.
Thanks for sharing. I’ll try
Hi All,
could you please tell me if the Stuart Sowerby’s pack “Fuji XTrans III – Profiles ready to use in RawTherapee” is suitable for X-T3 raw files?
If not, do you know where I can find HadlCLUT pack for “X-Trans 4”?
Thanks in adavnce,
Séverin
Have you tried @arangast 's collection on your X-T3 images? With GIMP and G’MIC creating your own on most Fuji cameras seems easy enough so you could compare (apart from any new film simulations X-T3 comes with or is it only “Eterna”?). @Morgan_Hardwood started a DIY thread How to create HaldCLUTs from in-camera processing styles
Hi Peter,
arangast is Stuart Sowerby 
@Severin, of course you can use them. There is only one big difference between the Stuart’s X-Trans 3 and his X-Trans 2 pack: the older one has a linear tone curve and so is compatible to the offixial HaldCLUT pack whereas the newer one has the tone curve built in, so the starting point for processing using in RT would be a linear tone curve.
Yes I did realise that, on forums I always refer to people by their usernames.
@Severin, yes the pack will work with X-T4 or any camera for that matter. I believe Fujifilm have been known to tweak their film sims in newer generations though so I can’t say for sure how closely they will match your OOC jpgs - give it a go and let me know!
@mannikon , I will try to build my own Lut with this tuto
@Sunhillow , I will take care on the tone curve: v2 vs v3 packs
@arangast , thanks for your packs, I will compare by myself X-T3 OOC jpgs with RT+LUT results
Thanks all for your quick replies 
and have a nice day.
Hi, first off, thanks for making these. However, I just bought an X-T100 and these don’t match up with my simulations OOC. I open the RAF file in Rawtherapee and apply these right away, is there something else I should be doing?
Hey @lep, welcome!
The simulations in RawTherapee are approximations of Fuji’s film stocks.
The OOC jpeg for Fuji’s digital cameras are tweaked on a per-camera basis. That means two different fuji models’ won’t produce exactly the same OOC jpeg if given the same input.
If you want to match the OOC jpeg exactly, then you need to calibrate your camera using a color target, then make a LUT from your particular camera’s JPEG.
I have an X-T20. To match the OOC I raised the raw white point (1.65 if I recall correctly) added some local contrast, enabled highlight reconstruction (luminance) and compressed some of the extreme highlights.
I did all this by eye and saved it as a profile. I then use it as a springboard to do my own further edits.
Also very important is to disable the automatic tone curve. If you read the comments above you will see that the last simulation versions already have a tone curve included.
You’re right. I had to increase the exposure compensation quite a bit (1.xx). It still doesn’t match the exact OOC results, but it’s good enough.
I set the profile to neutral. I think that should do it, right? I’m very new to Rawtherapee and editing RAW in general.
AFAIK there’s no DCP input profile for the X-T100 bundled with RT. If you can find (or create) a DCP profile for your camera, then make sure in the Color tab > Color Management that the DPC profile is picked up, and that “Baseline exposure” is checked. This should automatically correct at least part of the underexposure you see (Fuji cameras are known to underexpose by ~2/3 stops).
Hi,
pretty nice overall.
However, when I zoom in a little more, looks like a lot of color detail is lost.
Not sure what is is…
When I apply other haldcluts, I don’t see this issue.
I loaded the raw file, starting from a neutral profile and then applying the film simulation.
those artifacts look a bit like the ones I have found in my experience, see this thread for details: out of the box RAW rendering not up to JPEGs.
