Well, after a couple months trying to get a good picture quality for the PX-747, I think I have come with a decent and pleasant calibrated image for UHD/HD movies. I know we have much better options for a dedicated HT projector but considering the price, its colour wheel and offer, I think we still can get a good (and accurate) image from it. I was tempted to sell it and buy a Epson TW7100 (or BenQ W2700) but decided to get rid of this idea, so could invest in a new Dolby Atmos setup for the audio lol
I'm not sharing all of my settings because those are very specific for my unit (and also the factor I am in Australia, factory units might be different) but I've noticed some interesting things when playing with the general options (a lot!). I've used a i1 Display + CalMan, plus Ted's/S&M calibration discs. ChromaPure 3 has also been used for verification purposes.
HDR mode
Brightness - it is dependent of the HDR (EOTF setting): +2 notch, if using EOTF = Low (for Movie/"Night" mode) or +1 (EOTF = Medium, User1/"Day" mode). A HDR Brightness pattern is needed here.
Contrast/Colour/Tint - unchanged
Sharpness - 6 (default) or 7
Advanced-
a. Colour Temp: Normal or Warm (choose one and calibrate the grayscale, if an option- otherwise choose the "warmer" look and leave at the default values)
b. 3D CMS: I've found it poor to be calibrated, so left at the default values, which pushes to a "wider" colour gamut on Movie/User modes
c. Colour Enhancement: Here is the tricky. For HDR, mandatory to use it! Default is at 18. If using EOTF = Low, lower it to 9 and leave it for natural skin/flesh tones, otherwise skin tones (at 18) will look slightly pink/red/unnatural. On the other hand, leave at 18 when using EOTF = Med because this option flat and change the colours luminance.
d. Skin Tone: unchanged (=0)
e. Super Resolution: 4 (can enhance the perception without any artificial effect, in conjunction with Sharpness control)
Brilliant Colour: Also, very important to get a decent image! Default value of 10 makes things really bad (including Dynamic Tone Mapping by a Panasonic UB BD Player limited at 500 nits!). Try ON (=10) or OFF and you'll see artifacts/noise! Put Skyfall 4K UHD disc and check by yourself. To push luminance a bit (for HDR purposes), I've found 2 at the very best without any unwanted noise and tone mapping issues!
EOTF = Low (for Night mode) or Medium (Day mode), this is in conjunction with Brightness control (to help with shadow details). If using 'Medium' all the time, gamma curve is not flat and wash the picture (in brighter scenes, 40-70 IRE, midtones) for night time viewing. Otherwise, great to pop the image during the day (with natural light but not in a bright room, otherwise use Standard/Bright, even though I try to avoid these modes for image fidelity)!
SDR mode
Here Colour Enhancement & Brilliant Colour should be 0
Gamma value 2.2 (daytime) / 2.3 or higher (night time, personal preference- I prefer 2.3 to do not crush blacks and shadow details).
These settings helped me with the Colour Gamut and Shadow details ( this PJ doesn't handle it well, but it is really passable now!) which were my main concern since day one!
PS: To confirm and endorse the settings above, I checked the same scenes against my Panasonic GZ1500 OLED TV (which I consider my personal reference monitor, no one can't fault it, calibrated in Automated mode).
I hope it helps, feedbacks are welcome!