REC 2020 OR P3-D65
– P3 is more accurate but has more posterization.
– Rec. 2020 has smoother 10-bit gradation.
YEAR/MODEL
– The software appears to have changed since David Abrams published his video tutorial a little over a month ago, e.g., selecting Year/Model on the welcome page is no longer possible.
PATTERN INSERTION
– While it isn’t mentioned in Portrait Displays’ guide and doesn’t appear in David’s tutorial, you’ve got to enable pattern insertion.
WINDOW SIZE
– In the tutorial, David says to use a 10% window, but QD-OLED requires a 2% window.
MASTERING DISPLAY PRIMARIES
– In the video, David left the mastering display primaries of the pattern generator at P3, but we changed them to BT.2020. TBH, we don’t know whether it makes any difference.
PICTURE MODE
– The tutorial recommends setting the picture to Movie mode, but Filmmaker mode is more accurate.
GENERAL OBSERVATIONS
The grayscale is significantly more accurate this time around. There is less posterization. We would avoid Movie mode.
The Daejeon Chronicles 
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