how can I use kodak 2383 lut in the ACES workflow

if i am working in the acescct pipeline/ workflow. where and how can i properly add the kodak 2383 lut to my clip to give it the classic film look. thanks

There are many ways to do this, depending on what tools you are using and if you already have the LUT. There isn’t just one canonical “Kodak 2383 LUT”. Also, ACES is a framework so the specific constructs and sequencing of transforms required for a specific project will depend on the the specifics of the pieces involved.

For example, in Resolve, if you are in an ACES color management, you can right click on your clip and apply the Resolve-supplied “LMT Kodak 2383 Print Emulation”.

If you already have the LUT as a separate LUT file, it will depend on what the expected input is for that LUT. You can use available transforms to convert from ACES to the color encoding expected for input into the LUT. For example, if the LUT expects “DPX” input, you can use the ACES-to-ADX10 conversion to get to a density encoding that should play nicely with the LUT. Likewise, you could convert to other color spaces if required.

Keep in mind that this LUT is based on a limited dynamic range, so if you’re aiming for HDR deliverables you may see some wonkiness.

I have only done very limited testing of this LMT, but when I initially looked it seemed to be extremely limited in dynamic range, clamping the output below diffuse white. I do not know if this has changed in recent Resolve versions.

UPDATE: I just compared the version of the Resolve 2383 LMT I originally pulled apart with the one that comes with the Resolve 17 beta. They are not the same, so you need to do your own testing.

UPDATE 2: Resolve defaults to applying LUTs in timeline space, i.e. ACEScct, but the 2383 LMT indicates in the <InputDescriptor> and <OutputDescriptor> fields that it is ACES2065-1 in and out, as a true LMT should be. When the LUT Processing Mode is set accordingly, it becomes clear how significant the clamping is, with Rec.709 output clipped at about 82%, never mind HDR output.

Zyqcq214,

If you are looking for the ‘filmlook’ you can turn to some ACES history.
Look for the ACES 0.1.1 LMT.

Early in ACES the look was designed to emulate film. To provide backwards compatibility LMTs were created to bring those development looks in to the ACES 1.X looks.

Try looking at those and see if they get the look you are hoping for.

It will help you avoid the issues of new versions of software having different implementations for the same stated look.