Originally Posted by Drem
I am really amazed what the new frame adapt does to the picture. But from my brief testing yesterday I have a concern. In some scenes, seemed to be always with cloud gradients in the background. The Light level in the scene goes up and down a bit to much, with the frame adaption adjusting. I dont know how to better explain this. I can give some example scenes, however I dont have the exact h and m mark right now..
Thor Ragnarok - when Thor meets grandmaster the first time, sitting tied in the chair. The scene with grand master sitting between the two ladies arguing.
Wonderwoman - on the beach, when she dragged the pilot out of the water and says "youre a man.."
Star Wars Last Jedi - when Luke and Rey are on the cliff talking about the force, and he tickles her with the feather.
Watch these scenes, with HDR level on high, and frame by frame mode. Things get better with HDR level at medium or low, but then I think the picture seems more dull. Changing to scene by scene also makes things better, seeing the frame adaption not constantly adjusting.
Like I said this was initial testing, I will try more tonight to see if I can find a setting without issues.
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I would try switching to scene by scene instead of frame by frame.
This is just a guess, but I would assume some of the DTM algorithm is looking for highlights, which will always have gradients as opposed to just solid patches of one color. A lens flare or a bright light in a dark scene is an extreme gradient, where a bright wall color is far more consistent, so it would ignore a gentle gradient more than it would a more extreme gradient. Once it determines there are highlights in a scene it will apply an appropriate tone map to make those highlights pop more. But what if the background was all gradients, like in this case with a lot of clouds on a bright sky? The tone mapping would be constantly adjusting to keep the peaks from crushing, and the result would be the tone map constantly changing, if this is adjusting frame by frame. I would also guess that scene by scene averages more frames to ease up on the constant changes, and allow for the scenes like this to be more stable.
It's speculation, but it would seem that frame by frame will only work if there aren't any extreme frames like this where you have dark parts of the screen and a heavy gradient bright backdrop, or vice versa, a dark scene with lots of shadows and some very bright lights that are changing (like a torch in a cave scene).
The more people use this, the more it will become clear which mode is best. I switched to scene by scene and didn't notice much of a difference so I left it, figuring that in some cases it might be best. My goal is to have a "set it and forget it" mode, so whatever works best most of the time is what I will end up leaving on..