In case you are using a current Panasonic Player for HDR playback:
I have designed 4 HDR curves that can be loaded into gamma 7-10 using Sony's Image Director 3.1. software. I am using the Panasonic UB9000 that offers various display types, including Projector with moderate luminance (350 nits) and Projector with bright luminace (500 nits). For each of these 2 types I have designed 2 curves. These curves were made with an Arve tool for Sony projectors and are clipping at 350 and 500 nits (bh).
So on the Panasonic players side I give out HDR/2020. It's very important to use the Optimizer since these curves clip either at 350 or 500 nits in order to work best with the display type that you have selected.
On the projector side: HDR off, 2020 and one of those curves loaded into gamma 7-10. Brightness about 50 and Contrast max (depending on calibration). Please check with both Sony info screen and the Pansonic playback info that you indeed are projecting HDR/2020.
Those curves were originally designed for my setup with about 180 Nits (screen 110", 16.9, gain 1.4). Yesterday I could test it on a friend's VW760 (with 180", 16:9 and gain 1) having only about 80 nits max. We compared the tonemapping with that of madVR used by my friend (dynamic version with latest build). To summarize this highly interesting mini shootout: We were both impressed and astonished that those curves worked so well even compared to madVR which we probably all agree is the bench mark. So one of my conclusions was that it looks like that those curves could be used with many very different setups (screens). So you may give it at try.
Here is the download link:
P.S. unfortunatelly the UB820 does not offer a display type with 350 nits. I am using mainly the 350 nits curves.
P.P.S of course those curves can be used also with other HDR projectors from Sony (e.g VW295, VW695, VW995 and VW5000).
P.P.PS. I also did versions of these curves for JVC and I am going to test that with my old X7000 that I had sold a while ago. Its buyer is also using madVR and we already have fixed next Monday to give it a try. Great fun
Update: Since many people don't have a UB9004 and to simplify matters I removed the 350 nits curves. Now there are just 2 curves which should go fine with the Display Type "Projector with bright luminace (500 nits)". One curve has moderate brightness with a focus on contrast and highlight details and the other one on brightness.