After some viewing of HDR material I found that I was getting overexposed clipped whites on certain films like Everest. I emailed my calibrator and he came back over last night.
Did a little more testing, and discovered digital cinema just doesn't have the light output. So I suggested bright cinema mode. He tested it and found it had double the light output.
I read on here that you lose the P3 colorspace once you switch out of digital cinema/cinema mode. I can confirm that is not true. The green had more of an error in bright cinema mode vs digital cinema, but the p3 colorspace is still being shown.
He got everything dialed in, and added a custom gamma curve. We tested it on some material and WOW what an amazing picture! The HDR is as bright as I have seen it, and on some scenes it almost can hurt your eyes.
I rewatched Everest last night, and it was stunning no clipping, and great detail. Then I tried a darker movie Suicide Squad, which is also mastered at 4000 nits. It was really awesome. Blacks were still really good but the overall shadow detail, and light floor seemed to be raised. The ending with all the lightning was very bright. Skin tones are nearly perfect now.
I also had him check Natural, but it was not as bright as Bright Cinema. We got over 26 ft lamberts at the screen with Bright Cinema. Which is only around 86 nits. Even though the movies are mastered at 1000 to 4000 nits, my calibrator explained that most HDR highlights in movies average at around 100 nits currently. It is doubtful that projectors will ever be bright enough to do HDR properly, but it still looks really good on the calibrated Epson. Better than SDR, and that is what I was looking for.
So besides the small error to green the other colors calibrated nicely. So in the in end Auto Bright (HDR 1) with Bright Cinema is the way to go. Calibrated Colors, and a custom gamma curve. Super White off, Auto Iris off (user discretion) no super resolution or detail enhancements.
A wonderful calibrated picture...Thanks for reading! The End
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