ACES Transforms

In this repository, I have made several IDTs and ODTs that can be used with DaVinci Resolve to add support for these cameras. In most cases, the IDT and ODT were based on the spec sheet provided by the camera manufacturer (this is the case when the spec sheet is in the specs folder). Otherwise, I have used some other method to create the transformation.

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Current supported Log curves

IDTs and ODTs are provided for the following log curves/image profiles:

• Apple Log
• DJI D-Log
• DaVinci Intermediate
• FilmLight T-Log E-Gamut
• FilmLight T-Log E-Gamut V2
• Freefly Ember HLG
• Fuji F-Log
• Fuji F-Log2
• Fuji F-Log2 C
• GoPro ProTune Native, Color Profile
• GoPro ProTune Native, Flat Profile
• JPLog2
• Kinefinity KineLog3
• Leica L-Log
• Nikon N-Log
• Phantom Log1
• Phantom Log2
• Samsung Log
• ZCAM Z-Log2

Display ODTs

The RRT and Display transform code is pretty directly lifted straight from ACES 1.3.

Installing ACES Transform DCTLs in DaVinci Resolve

Download the IDTs and ODTs folders. On Windows and MacOS, put their contents in the IDT and ODT folders located in the following directories:

(Windows)
%AppData%\Roaming\Blackmagic Design\DaVinci Resolve\Support\ACES Transforms\

(MacOS)
[YOUR USER DIRECTORY]/Library/Application Support/Blackmagic Design/DaVinci Resolve/ACES Transforms/

Note: On both Windows and MacOS, these are hidden directories! You may need to show hidden directories to navigate to them.

For example, place the Fuji F-Log ODT.dctl file in the following folder on MacOS:

/Users/<your username>/Library/Application Support/Blackmagic Design/DaVinci Resolve/ACES Transforms/ODT/

or on Windows:

C:\Users\<your username>\AppData\Roaming\Blackmagic Design\DaVinci Resolve\Support\ACES Transforms\ODT\

Once you've done that, restart Resolve and they should show up in the ACES Transform node and in the color mangement settings.

Linear to Log Conversions

If you're starting from linear EXR files and have a resize step to get to your timeline resolution, and your resize algorithm selected in Resolve is one that sharpens the image and therefore has negative lobes (ie "Sharper", Lacsoz, etc), then this resize step will push negative values into the image. As a result, you need to resize while in a log space.

If you're in node-based color management, the only opportunities you have to do that linear to log conversion are:

1. Right click on a clip and choose an "Input LUT", and choose a DCTL that converts from linear to some log space. The selected Input LUT is applied to the clip's source resolution and therefore lies before Edit Sizing/Color Page Input Sizing.
2. Use the Fusion page to handle the conversion (slow)

For your convenience, I have created a folder called "Linear to Log Conversions" that you can put into your conventional LUT directory and therefore make these DCTLs accessible via the Input LUT right click menu.

Matrix calculator

I used this tool to calculate the matrices here. Set it to CAT02 chromatic adaptation.