Monitor calibartion? LG31mu97

[Ron Michaels]

Hey everyone,
I do apologize if these questions have been asked before, However I have done some reading and I feel more confused than when I started....
Ok, so I have a classic Mac Pro with a nvidia gtx titan x hooked up to a LG31mu97-b via display port and I plan on grading a feature meant for cinema. (DCI-P3)
Im wondering if anyone on here uses this monitor and if anyone here has calibrated it? I was thinking about using an i1 display pro and renting lightspace CMS to do the calibration.

Is lightspace and a i1 display pro worth it, or would x-rite software suffice?
Should I calibrate the monitor to get as close to DCI-P3 (FYI its advertised as being able to get 97% DCI) or would it be best to just calibrate to Adobe RGB which it claims to get 100%
Does the LG 31mu97 have a way of applying a LUT, or do I calibrate to create a LUT to be used inside of resolve?
Should gamma be set to match within the calibration software as well as in display setting in OS X and on the monitor itself?
What kelvin?
Can/should I create an ICC file for OS X?
I tried to do a pre-calibration monitor setup for lightspace and ran into a problem. It seems while connected via Displayport 1.2, (in the monitors own settings), the option for something called "Black Level" is greyed out. According to the manual this option only works when connected via HDMI and can be set to "High" or "Low". When connected to Displayport it is greyed out and set to "High". I can't really use HDMI on this monitor because it can only do 25hz at full 4k, whereas display port gives 60hz on OS X. Problem was that when looking at brightness and contrast images on my screen and making the manual adjustment to my monitor, I could not bring in several steps of black as they were completely blacked out. But when connected HDMI and toggling between "High" and "Low" i was able to bring them in..

Should I just sell the monitor and get a different one? Perhaps one that accepts LUTS?

Thanks so much guys/gals this site has helped a lot, any answers would be greatly appreciated.

 

[Marc Wielage]

You can't color-correct right out of a Mac (or a Windows or a Linux computer). The signal has to be color-managed -- outside the operating system -- and the monitor itself has to be calibrated to a known standard, like Rec709 or Rec2020/2084.

In order to calibrate, you need test signals from a valid source, coming from a display adapter, and a measuring device for the front of the monitor, which is in turn connected to a laptop equipped with calibration software.

Be warned that even with calibration software, not all monitors (especially consumer monitors) are capable of being calibrated and will fail. A faulty viewing monitor can lead you down a perilous path.

My opinion is that you can't color-correct in P3 on a monitor at all if you're intending to use this for theatrical delivery. You really need a large projection screen in order to duplicate that kind of environment, and it has to be capable of all the DCI specs.

There are many, many references on the web that will point you to good methods for monitor calibration, choosing a decent display for color correction, and what's necessary for a reasonable color environment that will translate to the real world. I would start with Steve Shaw's tech papers and forum on Light Illusion:

http://www.lightillusion.com/

and also Spectracal's Calman:

http://calman.spectracal.com/

 

[Adam Griffith]

I'm not a colour expert at all. however I also own the LG31MU97 4k monitor - use it as my second display on a 27" 5K iMac.

I used a datacolor spyder to color match and calibrate my displays. It basically creates a profile for MacOS to use.

You can calibrate the LG screen itself with its own internal software however I dont know how to do this, nor have I attempted it.