Convert-cube-to-xmp Repack -

Convert-cube-to-xmp Repack -

Convert Cube to XMP: A Practical Guide

4. Conversion Logic

The core conversion steps are:

  1. Parse .cube file

    • Extract size (N), domain min/max, and table values.
    • Normalize table values to 0–1 range (already typical for .cube).

  2. Resample (if needed)

    • Adobe XMP LUTs often require sizes like 32³ or 64³ (not 33³).
    • Interpolate (trilinear or tetrahedral) to target size (e.g., 32³).

  3. Encode as base64

    • Flatten the 3D table into a linear array of float32 triplets.
    • Convert to raw bytes → base64 string.

  4. Generate XMP container

    • Construct XML with Adobe’s namespace.
    • Insert base64 blob into <crs:LUT1>.

  5. Save as .xmp

    • Can be sidecar file (.xmp) or embedded inside DNG.

Method 2: 3D LUT Creator (3DLUTC) Workflow

3D LUT Creator is the gold standard for professional colorists who need to move between Resolve and Lightroom. convert-cube-to-xmp

  1. Launch 3D LUT Creator.
  2. Load your .cube file into the software.
  3. Go to the "Export" menu.
  4. Select "Adobe Lightroom / ACR Preset (.xmp)" .
  5. Configure the export: Decide if you want the LUT applied as a "Profile" (in the Calibration panel) or as a "Look" (in the Basic panel). For accuracy, choose "Profile."
  6. Save the XMP file.

This XMP file will now appear in Lightroom under "Presets" or "Profiles."

2. File Format Anatomy

1. Overview

convert-cube-to-xmp is a tool/script designed to convert color lookup tables (LUTs) from the common .cube format (used by DaVinci Resolve, OpenColorIO, etc.) into Adobe’s XMP structure for LUTs — specifically LUT1 or LUT2 profiles used in Adobe Camera Raw (ACR), Lightroom, and Photoshop. Convert Cube to XMP: A Practical Guide 4

This conversion enables colorists, photographers, and developers to take creative LUTs (film emulations, technical transforms) and apply them within Adobe’s non-destructive raw processing pipeline.