So ultimately I want to use LUTs (look up tables) in OBS. OBS wants those as HaldCLUT which means in .png format. I have a bunch of LUTs that I would like to try out but those are mostly in different formats like .cube, .3dl or .vlt. I know I can use a neutral HaldCLUT as a base to create new ones and OBS does have one of those as a PNG file.
So now all I need is a linux image editor that can handle LUTs in .cube, .3dl or .vlt format.
I have tried Gimp 2.10 and Krita 4.03 but could not find anything.
Ideas?
Looks like ImageMagick may be able to do it.
This thread showed some promise:
https://www.imagemagick.org/discourse-server/viewtopic.php?t=22252
I’m the exact opposite of knowledgeable when it comes to LUTs, so I just thought I’d try and point you in the right direction.
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The very next page seems to hold the solution.
Thank you! 
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Glad to help. I guess I missed the pagination. 
Dammit, have to fiddle with it a little. There are different types of these png LUTs.
But I’ll figure it out, probably gonna post the solution here in a bit.
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