Originally Posted by Marc Alexander
This is the joy of calibrating OLEDs. Veering too far from certain defaults result in digital artifacts such as what you observed. LCDs are so much easier to calibrate IME.
Nothing beats owning the set yourself to really understand how best to calibrate (I have several LCDS and the OLED65E6P). I had every intention of purchasing an A1E until I saw the prices. Instead, I have to rely on the network of calibrators to determine best practices on the set (until prices drop).
That would make sense except that I replicated that same banding on a Samsung Q9F as well as a Sony VPL-VW365 projector, so the root cause here is not applying calibration settings to an OLED panel.
The issue likely is with the content, not the gear. You can't assume perfect capture and perfect mastering, even for a flagship Ultra HD Blu-ray title like Planet Earth II.
As an aside, I surely do agree that you can't push the controls of an OLED too far before you start creating new issues like exaggerated noise and posterization. Mind you, I have not calibrated a 2017 OLED and in particular I have yet to put a meter on a Sony OLED, but that has been my experience with LG OLEDs in the past.
It's a truism the getting a "perfect" graph out of your calibration software does not always translate to "perfect" subjective picture quality as seen on the screen. When the adjustments you have to make to get there are large, other issues can crop up.
Also, I agree that if you have extended experience with a TV (own it, or in my case hold on to a review unit for an extended period), it does help in figuring out how to get the very best performance from it, because that takes time.