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What LUTs does everybody use?

PostPosted: Thu Dec 07, 2017 10:19 pm
by Matt Thela
Im Curious if anybody here uses LUTs in their Editing workflow with footage from the Ursa Mini 4.6 or Pro cameras, and what LUTs they use.

I'v gotten the Impulz and Osiris LUTs. I feel the Osirus LUts work great with Sony SLog 3 footage from my A7sii, but i'm not always thrilled with how they look on the Ursa Mini Pro footage.

Re: What LUTs does everybody use?

PostPosted: Fri Dec 08, 2017 7:27 pm
by Jamie LeJeune
I would avoid Impulsz and Osiris. Fine if you like the look, but most of those LUTs are so extreme you'll have to fight in the grade to keep things consistent from shot to shot and scene to scene unless you shot specifically to hit exactly what the LUT was designed to expect as an input. I also don't think they offer any LUTs designed with the current 4.6K FIlm v3 as an input, which would also explain why they aren't working for you.

For the Ursa Mini 4.6K or Pro, you can't go wrong with Kholi's Comet Color LUTs as a starting point to your grades:

Another option is to work without LUTs and grade in ACEScct:

EDIT: BTW if you do choose to use ACES, here's a LUT you can load into the Ursa Mini 4.6K + Ursa Mini Pro (or any other monitor that accepts .cube LUTs) for monitoring that matches exactly (or as close as technically possible with a LUT) the transformation that ACES makes from 4.6K film v3 to REC709.

Re: What LUTs does everybody use?

PostPosted: Mon Dec 11, 2017 1:41 am
by OwenCrowley
Jamie, thank you for sharing this referral to ACES workflows (not so mention your expertise on other topics in this forum). I just tried it on some test footage I shot the other day and the results were dramatically improved, compared to a traditionally achieve grade that was much more effort.

I will try out the LUT also. My strong preference is to expose to minimally processed sensor data, but the LUT might help those who look over my shoulder during shooting.

Re: What LUTs does everybody use?

PostPosted: Mon Dec 11, 2017 7:27 am
by Jamie LeJeune
Very glad it was useful info.

As for exposing, in my experience viewing only the log signal can easily lead to underexposing and then having to deal with noise reduction (or facing unremovable fixed pattern noise). I'm sure you're well aware that none of the BMD cameras, not even the Ursa Mini Pro, do well when underexposed. Personally, I prefer to have a LUT loaded into the LCD (or external monitor) that is as close as possible to the intended look for the project as an additional check to make sure I've got the exposure dialed in. If the look of the project hasn't been set, I'll use a LUT that pulls the image down a half stop or so (Kholi's A side is good for this purpose), so that during color grading I can be fairly confident that we won't have to fight noise in the image.