I think it would be a great benefit for Unreal Engine to implement 3D LUTs for HDR Grading. They are already becoming an industry standard and allow a greater an preciser grading.
- Grading in HDR instead of SDR allows for Grades that keep steady through their brightnesses and give the great benefit that they, as they are applied pre-tonemapping, are consistent across HDR and SDR, which would make the Post Processing of Unreal Engine future proof.
- The Unreal intern Grading Tools are nice, but really rather cumbersome in comparison to real Color Grading Softwares. DaVinci Resolve is a very professional tool set, that allows to export 3D LUTs being exported in their free version. I am certain that it should seem obvious that Unreal cannot, but also doesn’t even have to, compete with the capabilities of a determined Grading Environment.
For a further read, this is how Dice did it:
I would love to hear your thoughts