Calibration report using these settings:
TV software/firmware version tested: 03.00.60
Picture settings notes: CNET is no longer publishing advanced picture settings for any TVs we review. Instead, we'll give more general recommendations to get the best picture without listing the detailed white balance or color management system (CMS) settings we may have used to calibrate the TV. As always, the settings provided are a guidepost, and if you want the most accurate picture you should get a professional calibration.
Prior to calibration the LG C8's Technicolor Expert and ISF Dark settings delivered the most accurate image. The main difference between the two was light output, with Technicolor at about 250 nits and ISF Dark at 200. For my calibration I tweaked the 2-point white balance controls and further improved the image, but it wasn't necessary to adjust the 20-point controls. The CMS was likewise extremely accurate and didn't really need any adjustments, but I performed a couple of mild changes anyway and it improved even more.
It's worth noting that I didn't have to adjust Brightness above the default 50 for full shadow detail -- last year it had to be set at 51. The default setting for BT.1886 gamma was also almost spot-on, an improvement from last year where I used the 2.2 setting instead (because it actually cae closest to my BT.1886 target for SDR).
Picture Mode Settings: ISF Expert (Dark Room)
Aspect Ratio Settings: 16:9 (Just Scan: On)
Energy Saving: Off
Additional settings menu:
Eye Comfort Mode: Off
HDMI Ultra HD Deep Color: On [for inputs connected to 4K HDR sources]
Picture mode menu:
OLED LIGHT: 37 for a dark room, Higher (your discretion) for a bright room
Expert Controls menu:
Dynamic Contrast, Super Resolution, Color Filter: All Off
Color Gamut: Auto
White Balance: Warm 2 [other adjustments will vary per sample]
Color Management System: [no adjustments]
Picture Options menu:
Noise Reduction, MPEG Noise Reduction, Motion Eye Care: All Off [for low-quality sources, some users may prefer to enable noise reduction]
Black Level: Low
Real Cinema: On
Motion Eye Care: Off
TruMotion: User (De-Judder: 0, De-Blur: 10, Motion Pro: Off)
HDR Notes: As with SDR, Technicolor Expert delivered the most-accurate picture settings for HDR10, and it was superb, even better than last year. It tracked the EOTF extremely closely, showed a very accurate color checker reading and excellent coverage of the P3 gamut. I also appreciated that, just like last year, the LG OLEDs automatically detected and engaged the "HDMI Ultra HD Deep Color" setting designed for HDR sources.