gregcotten
commented
9 years ago @icifredo,
Reversing a 3D LUT is notoriously difficult. We've played around with it but essentially there are some inherent issues with doing it. For example, if the 3D LUT has any clipping or a non-uniform color transformation, it's very likely the 3D LUT is not perfectly reversible.
Certainly the 1D characteristic of the LUT can be easily reversed. If you want to reverse the 1D characteristic of the 3D LUT, just convert it to 1D and use the reverse tool. You can then convert it back to 3D if you wish.
Hello
Would it be possible to add a functionality that will revert the LUT ?
It would be useful for specific colourspaces conversions.
For exemple : someone give me a personal look that converts from arri log C to rec709. I have received a shot into rec709 and want to match it with the arri rushes, so that I need the revert transform of the LUT.
Thank you Frederic