I have used "Image 2 LUT" to create a LUT for Unity from a certain movie. However, currently "Image 2 LUT" only outputs ".cube" files.
For HDRP, this is great, but for some reason, URP doesn't accept .cube file. URP expects specially laid out .png LUT file.
Is there any way to convert a .cube LUT file to a PNG that I can put into the slot of Color Lookup-> Lookup Texture with URP?
Unity expect this format:
The tutorial that Google finds and recommends is this.
However, I don't have Photoshop. Also, the tutorial deals with a square LUT that looks like this:
So even if I had Photoshop and I would follow the tutorial, I would still have a square LUT which is not laid out as Unity would expect it, so I did not use that tutorial.
How do I create a LUT png from a .cube file that I can use with URP?