GPU Configuration and Troubleshooting

Nobe Color Remap supports GPU processing in CUDA, OpenCL, and (on macOS) Metal.

CPU mode is also available, but it is much slower and intended only as a fallback.

Processing behavior depends on three settings layers:

  • DaVinci Resolve GPU mode (Auto / CUDA / OpenCL / Metal)

  • OpenFX plugin processing mode (CPU / GPU)

  • Nobe Color Remap settings for Window Mode (Auto / CUDA / OpenCL)

DaVinci Resolve GPU Settings

Resolve GPU mode controls how Resolve processes frames internally and affects plugin processing in Overlay Mode.

Available options include OpenCL, CUDA, Metal, and Auto:

You can also force plugin CPU processing in the OpenFX controls:

GPU Settings in Plugin Options

The plugin Settings window also has a GPU mode option.

This setting applies to Window Mode only. Window Mode processing runs independently from Resolve, so it can use a different backend.

Example: Resolve can run in OpenCL while the plugin dialog runs in CUDA.

If set to Auto, Window Mode follows the GPU mode currently used by Resolve.

Advanced GPU Settings

On multi-GPU systems, you can set the OpenCL device manually in config.json using opencl_device.

Typical config file locations:

  • Windows: C:\Users\USERNAME\AppData\Local\NobeColorRemap\config.json

  • macOS: /Users/USERNAME/Library/Application Support/NobeColorRemap/config.json

Add or edit the opencl_device value in the config file:

DaVinci Resolve 16+ Notes

When upgrading from older Resolve versions, the Color Distribution graph may disappear.

If that happens, make sure the option shown below is disabled in plugin settings (Overlay Mode):

On older Resolve versions (12.5 and 14), disabling this option can cause large slowdowns.

Recommended legacy setup:

  • Resolve 12.5 and 14: Direct Frame Access enabled

  • Resolve 15, 16, 16.1+: Direct Frame Access disabled

Collecting Logs for Bug Reports

Include plugin logs when reporting issues. Use the Logs button in the utility app:

Image/Viewer Issues Checklist

If viewer image issues appear, or if Color Distribution is missing in Overlay Mode, try:

  • Disable Enhanced Color Picker in Options > Settings

  • Enable Fetch RGBA Texture in Options > Settings

  • Disable Use optimized image transfers for viewers in Resolve

  • Disable Direct frame access in plugin settings

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