Exporting LUTs and Colour Transforms

Exporting a colour transform file (CTF) or LUT allows you to create a transform that applies a specific colour processing operation for use in other applications. Any application that supports a sufficiently recent version of OpenColorIO should be able to apply a CTF file as an OCIO FileTransform.

Exporting a LUT or colour transform from the Colour Management tool is different from saving a setup:

• A chain of colour transforms is exported as a single .ctf file that losslessly preserves each component operation. When imported, you cannot modify it.
• PhotoMap, EXR Display, Gamma, 1D LUT, Lin to Log, and Log to Lin are exported as baked 1D LUTs (.lut files). When imported, you can modify their curves only with the Advanced settings.

Exporting a Colour Transform

1. Access the Colour Management tool and select one of these modes: Colour Transform, Input Transform, or View Transform. For Colour Transform, you must enable "Custom".

2. Click Export.

   The file browser appears.

3. Type a file name in the Export field. The .ctf extension is added automatically.

4. Select the destination location using the location shortcut button next to the file name Export field:

   • Shared is a useful location for storing transforms that can be used by other projects on the same workstation.
   • Project is a useful location for storing the transforms that are stored with the current project, for example, for archiving.

5. Click Export.

   The colour transform is exported to the specified location.

Exporting a 1D-LUT

1. Access the Colour Management tool and select one of these modes: PhotoMap, EXR Display, Gamma, 1D LUT, Lin to Log, or Log to Lin.

2. Click Export.

   The file browser appears.

3. Type a file name for the LUT in the Export field.

4. If you want to generate an inverse LUT with the _inv suffix appended to the file name, make sure that the Generate Inverse Lut option is active.

5. Click Export.

   The LUT is exported to the specified location.