LUT Export

Context

Compositor or Shader Editor > Sidebar > MacBlend

Export LUTs writes paired Forward and Inverse LUTs in .cube format.

Settings

LUT Size : Selects a \(17^3\), \(33^3\), or \(65^3\) lattice. The initial size comes from the MacBlend add-on preferences; \(33^3\) is suitable for general use. A larger lattice increases file size and processing cost without improving the fitted matrix.

Clamp to 0-1 : Restricts every output channel to the unit range. This supports applications that reject extended values, but discards negative values and values above one.

Files

Filenames use {working space}_{source}_{target}[_normalized]_{direction}.cube. The first token identifies Blender’s scene-linear working space. A reference target uses the selected targets’ name; an image target uses the target image name.

Every export creates one _Forward.cube and one _Inverse.cube file. Existing destinations are listed for confirmation before replacement.

Note

When Normalize is enabled, exported LUTs correct color shifts only; they do not match the target brightness. To create LUTs that correct both color and brightness, disable Normalize before exporting.