Description:

The Color Map effect is hard-coded to look for LUT_3D_SIZE in the .cube file. If the file contains a 1D LUT instead using LUT_1D_SIZE then the color mapping does not work.

For a specification of .cube file format, see: https://kono.phpage.fr/images/a/a1/Adobe-cube-lut-specification-1.0.pdf

Reproduction Steps:

1. Download latest RC candidate binary.
2. Launch app image file.
3. Add a video clip and drag it to timeline.
4. Open Effects tab.
5. Drag "Color Map / Lookup" onto the clip.
6. Set the cube filename to a file that contains a 3D LUT.
7. Observe: color mapping works.
8. Change the cube filename to a file that contains a 1D LUT.
9. Observe: color mapping does not work.

Expected Behaviour:

Color mapped video, regardless whether a 1D or a 3D map is being used.

Version:
3.4.0 Release Candidate

OS:
Ubuntu 25.04