Originally Posted by Bytehoven
Chad did my initial setup (200ish hours) because I was totally unfamiliar with the nuances of HDR and the JVC eshift series.
I was considering having Chad return if/when I acquired a Lumagen Pro.
I have a Spyder 5 and an Extech light meter. My CalMan seat is way expired but I have HCFR I never used. So, not the preferred tools to get the best results.
I'm approaching 1400 hours on my 1st lamp, so I'm in the zone for a possible gamma droop touch up anyway. Or I could install and burn in my new lamp, recal and keep the current lamp as a back up.
IMHO for very best results you want a profile of your display in the modes you'll use for SDR and HDR in the most linear modes you can, converted into a REC709 3D LUT (BT1886 gamma) and a P3 3DLUT (2.4 gamma). These provide a "reference" base so then what you're looking at should be correct colour plus the excellent Lumagen tone mapping. In my experience to date Lightspace generates the best LUTs consistently. They've just added the ability to generate the 1D separate from the 3D which gives an extra level of accuracy.
My own X7900 doesn't reach REC709 gamut without the filter in, so I have two modes, both with the filter in place, but with the HDR mode having the iris more open than SDR (I use -9 for SDR and -3 for HDR currently). You can have the Lumagen switch the projector between modes (with some limitations) using the HDR gamma flag over HDMI (can only select certain modes), or you can do what I did and have some external control switch modes in the projector over IP or RS232. That allows you to pick user modes for HDR vs SDR signals.
I use a bit of a hack that "works for me" which allows you to use profile off (the very most linear mode on a JVC, without colour management or even the gamma autocal) with the filter in place. This means my gamma droop is also corrected in the 1DLUT in the Lumagen.
Set up CMS0 set to REC709. CMS1 set to DCIP3. CMS1 with DTM enabled, DML to around 6x your max measured nits, low ratio set to make the effective nits = 2x the measured peak nits. I have DSAT set to 0, which is supposed to prevent / reduce colour desaturation hue shift. It presently doesn't fully do this, but there is an update in the works to fix the behaviour.
The above represents what I think is a "reference" calibration for a JVC with a Lumagen, but starting from zero. If you're just trying to use it with your existing calibration; assuming your REC709 cal is good you don't need to load a LUT for that. If the HDR mode calibration is also tracking right for REC2020, then you don't need a LUT for that either and can set the output for CMS1 to 2020SDR output (but with the HDR flag to switch modes) and set the gamma to be 2.4 gamma curve in the projector. Then tune the DTM parameters as above (DML, low ratio, DSAT).
Anyway, that's what I'd do. If you are usually in the capable hands of a calibrator then I'm sure either Chad or Kris could help you get set up remotely to a pretty good level until a calibration makes sense with lamp etc in consideration. Good luck!