What this converter reads and writes
| Format | Values | Grid |
|---|---|---|
| Cube (.cube) | Floating point, 10 decimal places | 2 to 33 points per axis |
| Autodesk 3DL, Mesh header (.3dl) | Integer codes: 8, 10, 12 or 16 bits | 3, 5, 9, 17 or 33 points per axis |
| Vertex-list 3DL (.3dl) | Integer codes: 8, 10, 12 or 16 bits | 4 to 33 points per axis |
| CineSpace CSP (.csp) | Floating point, 10 decimal places | 2 to 33 points per axis |
For how these formats differ, see Cube, 3DL and CSP: LUT formats explained.
How it avoids silent mistakes
- Everything stays on your device. The conversion runs in this page, so there is no upload and no account.
- The result is read back. After writing, the converter reads the new file with the same rules and compares every value with your LUT. If they do not match, it offers nothing.
- It refuses instead of guessing. 1D LUTs, 1D shapers, changed input ranges, values outside 0–1 headed for integer formats, and grids above 33 points are reported rather than altered.
- Integer formats round, and it tells you by how much. Converting to 3DL quantizes to the bit depth you choose; the largest change is shown next to the download.
Changing the file format does not convert between color spaces or signal ranges. Load the converted file in the destination application and confirm its input and output encoding, range, and interpolation settings. This tool does not measure or correct a display.
When a file converter is not enough
PatternSpace for Mac works on the whole LUT delivery, not just the file format.
Larger grids and more formats
Read bigger grids, choose the export grid, and handle CLF, Quantel, Truelight, Nucoda and IRIDAS Look files, including 1D shapers.
Analyze before you send
Check range, monotonicity, neutral axis and channel interaction, and step through the areas that need attention.
Chain, adjust and reverse
Combine LUTs, add ASC CDL adjustments, and invert a transform, with every step inspectable on its own.
Verified export
Every export is encoded, read back and checked against its source before it is written, with warnings for anything that did not survive.
Analysis and export preparation are free in the app. Writing LUT files requires PatternSpace Pro. For several formats at once with a PDF delivery report, follow the LUT delivery workflow.