OpenDisplayTransform-OFX for DaVinci Resolve

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OpenFX ports of selected Resolve DCTL look tools from open-display-transform for DaVinci Resolve.

This repository provides GPU-accelerated OFX plugins adapted from selected ODT DCTLs. The plugins are distributed through MCNexus, which handles license activation, downloads, updates, and platform-specific installation.

Original Open Display Transform project and DCTL source by Jed Smith:

https://github.com/jedypod/open-display-transform

Included Plugins

This build currently includes:

Plugin	Status	Distribution	Get Key
ODT N6 Color	Active	MCNexus / OpenKey	Get Key

Planned backlog:

Plugin	Status
ODT Zone Tone	Planned

ODT N6 Color

ODT N6 Color is a single OFX plugin that groups the following Resolve DCTL tools into one Resolve effect:

• n6Purity.dctl
• n6ChromaValue.dctl
• n6Vibrance.dctl
• n6HueShift.dctl
• n6CrossTalk.dctl

The port keeps the modules separate in the UI, but processes them as parallel branches from the same clean RGB input. Each module reads the original source RGB, computes its own result, and contributes through its own Mix control. The final result is blended against the clean input with the global Output Mix.

This keeps the OFX predictable for grading: changing one module does not feed unexpectedly into the next module as a serial stack.

Controls

The OFX appears under the Open Display Transform group in Resolve.

Current UI groups:

• Setup
  • Transfer Function
  • Output Mix
• Purity
  • enable/mix
  • RGB/CMY purity and strength controls
• Chroma Value
  • enable/mix
  • hue controls for yellow, red, magenta, blue, cyan, and green
  • hue/chroma strength and chroma limit
  • optional zone targeting
• Vibrance
  • enable/mix
  • global, six-hue, and custom-hue vibrance controls
  • optional zone targeting
• Hue Shift
  • enable/mix
  • six-hue and custom-hue shift controls
  • strength, chroma limit, and optional zone targeting
• CrossTalk
  • enable/mix
  • per-hue power, shift, and scale controls
  • CMY center controls
• Support
  • About and Help
  • App MCNexus

Supported transfer options:

• Linear
• Davinci Intermediate
• ACEScct
• Arri LogC3
• Arri LogC4
• RedLog3G10

Platform Support

Current builds are planned for:

• macOS
• Windows x64

Supported processing backends:

• Metal on macOS
• CUDA on Windows for NVIDIA GPU acceleration
• CPU fallback/reference path

Installation

The plugins are distributed through MCNexus. Each plugin will have its own OpenKey license entry, even when multiple plugins are published from this repository.

Activation flow:

1. Claim the matching OpenKey license for the plugin.
2. Open MCNexus.
3. Activate the plugin with that key.
4. Install or update the plugin from MCNexus.

Lost your key? Open the same claim link again with the same GitHub account to recover the same license.

Credits

Original Open Display Transform project and DCTL source:

Jed Smith
https://github.com/jedypod/open-display-transform

OFX port, MCNexus distribution, OpenKey integration, and MC OFX architecture:

Magno Ciqueira
https://github.com/ciqueira

OpenFX SDK:

Academy Software Foundation OpenFX
https://github.com/AcademySoftwareFoundation/openfx

License

This repository is licensed under the GNU General Public License v3.0.

The selected DCTL sources come from open-display-transform, which is also licensed under GPLv3. See:

• LICENSE
• NOTICE.md
• UPSTREAM.md

The generic MC OFX scaffold used as an architecture reference is authored by Magno Ciqueira and is authorized for use in this GPLv3 project. This does not include Vector-specific creative math or unrelated image-processing logic.

Binary Releases

Binary OFX releases are distributed through MCNexus and GitHub Releases.

Each binary release must include or link to the corresponding source code for that exact release. Release bundles include GPLv3, upstream attribution, binary distribution notes, and the OpenFX BSD 3-Clause support license under Contents/Resources/Legal.

See BINARY_DISTRIBUTION.md.

OpenFX SDK

Builds use OpenFX SDK 1.5.1 at:

• src/third_party/openfx

That folder is intentionally not committed to this repository. GitHub Actions checks out AcademySoftwareFoundation/openfx at OFX_Release_1.5.1 before building, and local builds should place the same SDK version in that path.