(ps: I keep using Sony Slog3 rather than D-Log, which was what the OP asked about, for two reasons - I don't have good D-Log files to play with, while I have a lot of Slog3, and because we have a well documented Slog3 IDT which is also available in Resolve, so we can perform validation. ctl file, then re-coded it to meet the DCTL transform function syntax, you would have a custom DCTL, which copied into the Resolve LUT folder can then be used instead of an input LUT/input transform and you had the same thing that the IDT would have done, which is using simple math rather than a bulkier LUT which had to be created and then interpolated from the original math.Īnd to complete the journey, this is the DCTL script that mirrors the Sony SLog3 IDT: If you had the gamma parameters and color space primaries that went into your custom LUT (as discussed above), and updated a sample. If you look in /Library/Application Support/Blackmagic Design/DaVinci Resolve/Developer there are a few sample DCTL files and a README.txt with some documentation on how to write one. Now this file is in ctl format, but it's 'relatively straight forward' to convert to a DCTL file. This is the original ACES IDT for Sony Slog3: Īs you see a 'relatively straight forward' piece of code and math to transform gamma and gamut between the camera reference and linear/AP0. LUTCalc has D-Log gamma, not sure which gamut you would have to select as the input for your LUT.Įdit: This link has some info on the gamut ( ) and others have suggested Alexa Wide Gamut worked reasonably well, but you may have to experiment with that.Īnd just to capture what happens in an IDT if you are adventurous and since I looked it up last night while playing with this: Or if you are more adventurous you can follow the above article to create a custom IDT. Resolve expects Linear / AP0 data if there is no IDT, so your LUT has to translate the camera data to that. Then you have to set Input Transform to None, and you have to use these LUT as an Input LUT (either in project or on clip), it doesn't work on a node, since according to above article the input LUTs are applied before ACES cct color space transform. Output: Linear y1.0 (Scene Linear IRE), ACES AP0 Gamut I was able to successfully emulate the Sony SLog3 IDT with a LUTCalc LUT with these settings:
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