DISPLAYCAL SETTINGS FOR 4K HDR GAMING FULL
So again, to avoid confusion, this is apparently an issue on near-blacks, not full black areas. "In time we discovered that when both TVs kicked into VRR mode the dithering fix for above black gamma overshoot would be disabled causing near-black to brighten in g-sync mode on the C9 and in all VRR modes on the CX so this is something for LG engineers to work on." So after I read that I went back to the vincent video at the timestamp he provided and took this screenshot and typed out this quote vincent of HDTVTest said at that timestamp on May 29, 2020: This near black gamma issue does make that thing more obvious and uglier though. The gradient thing in the new ori game is mostly caused by the game's engine itself. As a result, it never got fixed and now we continue see it on the CX, sadly. I saw it on my C9 and reported the issue on this forum months ago but back then almost everyone either ignored it or said they didn't see it and some even blasted me for asking about a C9's issue on a CX thread. The issue is present on both the C9 and the CX. It's very easy to see the issue if you conduct the same test as the one I did in my video linked above, or just take side by side pictures of near black scenes before and after enabling vrr. This means the overall picture contrast will be lower than optimal. The near-black gamma values become lower, leading to brighter near-black shades while other lighter shades' gamma remain the same. He put up a graph there showing the near black gamma with VRR/Instant Game Response enabled. Only the gamma of the near-black shades is screwed the rest is fine.
Your timeline and understanding of the issue is correct. It's more important to be more vocal about this issue so LG can quickly fix it.
DISPLAYCAL SETTINGS FOR 4K HDR GAMING PRO
This is an issue with the tv's Instant Game Response and has been acknowledged by many people including pro calibrators and TV reviewers like Vincent from HDTVTest so there's no point trying to deny it now and say things like "but games look absolutely perfect for me" (you simply won't realize the impact of the issue on the picture quality unless you pull a side by side comparison or conduct specific tests). Selecting different chroma and bit depth in NVCP will not solve this I have personally tried different combos and the result is the same (never chosen 420 8bit though so I may try that but almost 100% it won't help). Not sure which guy that person was referring to but I tested with Control (SDR, RGB 8bit full) and COD Modern Warfare (HDR, 422 12 bit limited) and several other SDR and HDR games and saw the issue in all of them.
you were using when the grey-blacks issue was exhibited. If possible, please provide details of what bit depth, chroma, gamed title if in HDR or not, tv mode settings (black level, contrast, brightness, gamma) etc. If it is localized grey-blacks, like grey-black haloing of a sort, then adjusting the overall screen gamma wouldn't be a valid workaround since it would ruin the rest of the screen/scene's accurate gamma and in scenes that aren't dark.Īny confirmation and re-iteration of these issues by anyone who has experienced it would be appreciated. Someone in this thread pages back said ori and the blind forest had weird gradients around white character on dark black backgrounds, and grey blacks. That could be difficult to determine in scenes where there would be a lot of near-black areas/edges, light to dark transitions though so the overall impression could be confusing (and perhaps confused as lighter gamma on the screen overall?). If all of the above is true, then it doesn't sound like it would be a overall screen gamma issue, but instead an issue localized to where the near blacks are located dynamically. the bypassing of the near black fix when VRR is enabled reportedly causes grey-blacks and perhaps even strange gradients around objects and areas, edges, perhaps like a grey black halo or gradient. when LG added VRR support, the near-black flattening fix for near black flashing got bypassed whenever VRR is enabled LG updated to a black flattening method as a workaround instead of the dithering of near blacks workaround the near-black dithering was a valid workaround (adding "noise" to near-black to avoid flashing), but it wasn't working in game mode optimally for some reason (resolution/detail loss I think?) LG updated their firmware to use dithering on the near blacks (I'm not sure if the dithering was localized to the near black so that the rest of the screen could remain un-dithered) there was a black flashing issue on near blacks on LG OLEDs To be clear, from what I understand from reading people's reports in this and another avs forum thread,
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