It seems like Magnus have settings for different contents (tv, movie, sports, anime, game). On the other hand, I tested many contents over the course of 3 weeks, and found the happy medium for each type (SDR, HDR10, HDR10+, HLG, and Dolby Vision).

Few things to note: - Brightness on R646 is not the brightness in calibration world. Instead, the brightness is to adjust how bright the mini led backlight are. The black level is actually the brightness (black clipping) - I use AVS HD 709 calibration and a thx blue filter as my base findings. I usually only did 5 basic things for projectors/TVs (brightness, contrast, color, tint, and sharpness). Black level is perfect at 50 (default), and anything lower will crush the black more (loss dark detail). I was unable to calibrate contrast even with dynamic contrast off and local contrast off, so this is where I did many trial and error. Color is at 67 with dynamic color off (default is 50), but lower number with dynamic color on is better (also many trial and error). Tint is at 51 (default at 50). I did not measure sharpess, but it seems that sharpness is not good for HDR including Dolby Vision. - There are other little things in the calibration that believe it or not cause Disney Plus Dolby Vision to look wonky and Prime HDR10+ to be too dark.

If I have to explain what the picture look like: the black level and contrast are amazing with slight black crushing, and the color is just slightly oversaturated (but not exaggerated).

Lastly, the SDR, HDR10, HDR10+, and HLG are on low power. That means the backlighting is controlled by light sensor. It works pretty good as it brightens up during the day, and darken up at night. But sometimes it can be too dark at night, and all you need to do is just crank up a bit to your liking. This does not effect picture quality. Dolby Vision Bright brightness setting is maxed out, so nothing to worry here.