I'm using LI Colourspace and a spectro for matching to my colourimeter. My main is an FSI. The LG is for client + 4K pixels. The SDR cal LUT verifies ok, but grey-scale and WB track different every time I measure. LG uses a weirdo range (16-255) - anything above 235 tests bad. My TPG is matched to the LG levels and I've turned off all Auto and ABL stuff. ++WOLED maintains Sat even in low luma which is a bit freaky.
LG unstable = everytime I go to profile this thing, it reads differently and requires different tweaks to settings and the service menu white balance for pre-cal. My FSI reads the same days, weeks and months later. I calibrate it once a quarter and the difference is negligable. The LG feels like it changes if I look at it the wrong way.
Interesting, I've had a similar experience calibrating my VT60 over the years. I wonder if it's either caused by the ABL or the pixels aging. I know for the VT60 specifically, everything changes depending on the window size due to the ABL. How long have you had the LG, I wonder if the panel is still breaking in and needs time to stabilize.
Yah. It is driving me crazy. I have put about 150hrs of break-in time on the panel with mixed content. I've turned all the ABL stuff off in the factory service menu so it should not be an issue. I'm using an L20 patch which is pretty small. I guess I could try L10. I'm running another ^17 cube right now and I'll see how it goes. I'm trying an 8 bit patch set instead of 10 bit this time around.
I have been spoiled by Flanders Scientific - their stuff always reads in a predictable way, drifts very little over time, and is super linear so you can get away with a tiny 144 patch set to build the calibration.
Just looked up the VT60. Wow. Are you running a software calibration LUT or a LUT Box with it? I've heard these are also very challenging to calibrate.
Holy cow, those Flanders Scientific displays are the real deal. Those things are nice, I've never heard of this brand. I've only been aware of the Sony reference monitors.
No external software or LUT box, the VT/ZT series has a real 6-axis CMS in the menu that gives you fine control over primaries in the gamut, 2-point & 10-point WB adjustment, and 10-point gamma adjustment.
It's the most difficult display to calibrate that I have ever owned, but it gives you enough control to get average dE scores below 1 in most areas and below 0.5 in others. I wouldn't use it for grading or anything professional, but for watching content, it's fantastic.
After wrestling with this for a month, I finally got a calibration working that tests well and looks "close enough" to my FSI montior. There's metameric failure to account for with the different display technologies, but I am more of a Trust the Scopes kind of guy than a perceptual matching kind of guy. With a ^10 verification cube I'm getting a dE of .5 and an EOTF of 2.39. Not bad.
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