Converting .cube/.3dl (a look-LUT) to input-ICC-profile for use in CaptureOne

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Noel K.

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Jan 7, 2019, 4:40:14 PM1/7/19
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Hi there. I might be totally in the wrong place for my idea/plan/request, but I'll give it a go nonetheless. As a disclaimer, the whole world and concept of LUTs and ICC is new to me, I probably don't speak your language but I think I have gained a bit more of what one would call a vague idea. Let me, in short, explain to you what I would like to achieve:

So I have a couple of cube and 3dl files here, all being look-luts as far as I can tell (another type of LUT seems to be a transform-lut, which, by the sound of it, is not what these are). Very well, I have successfully integrated them in Adobe Camera Raw via its very own functionality to import LUTs and save them in an xml-format. I can then use them within the section of camera-profiles in Lightroom. Great. So now, I wanted to move them over to CaptureOne (C1), since I was thinking about using the two of them to my liking. C1 though doesn't support LUTs of any kind, but it does support ICC-Profiles. Now, unless I grievously misunterstood, ICC-profiles and Lookuptables alter colours in a way that is similar enough to be more or less easily converted. In fact, I was able to save an .icc-file using bakelut with a given sourcefile. After applying this very profile to a photo in C1, though, the effect wasn't the same compared to a) Lightroom and b) a preview of the same sample-image with the original .cube-file applied in a third-party application. In fact, it was quite the opposite: less saturated, less warm, less bright.

I analyzed the .icc-file further and compared it to an .icc-file from a set of C1-Styles I bought back in the days. The one I bought was an input-profile. Now, I can't remember having classified the icc-profile as "input" while using bakelut, nor have I found documentation on corresponding parameters to be used during this operation.

Now, I don't know if that information "input" "display" "output" being written into the header of a profile changes anything within a given software, i.e. how the software reads/interprets the values within the profile (which may even have an identical architecture no matter which "class" it is). Or if, in fact, by classifying a profile as input/display/output, or scnr/mntr/prntr, a complete different file with a different architecture, will be created.

Well. I hope that I can reach out for some help here as it does not seem to be an overly active group. Please, forgive my lack of vocabulary considering this broad and complex topic.

Cheers!
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