Thanks for your response. Unfortunately, this has nothing to do with tone mapping. I use both the Six-G and Lumagen pattern generators. I know how to disable tone mapping to send a 2.4 gamma curve to allow the Lumagen to do all tone mapping after calibration. It's always easy to make sure that there is no tone mapping too; just run a quick grey profile and look at the gamma curve.
Kris is a good friend of mine and we talk on the phone often, sometimes multiple times daily. He's one of the few other calibrators in the USA who I recommend, but he's not doing LUT calibration on JVC projectors. In his opinion, the JVC's calibrate well enough on their own, and since he uses CalMan he has no way to do LUT's that have undersaturated color gamuts. On this point he and I highly disagree.
Your point of using the bit hack to apply the filter to the native JVC mode would be an interesting experiment on the NX9. I haven't played with the native mode without filter much on the NX9, so I am not sure if it's truly native or not (I tried it with the bit hack about a year ago and still did not get good results). I don't think it's really native on the NX9/7, but I will check. The trouble is that I have to set these up for clients, so using the filter hack is not a good option for me as a pro to use on client machines; it's just too complicated. However, on the NX9/7's I usually use a custom profile I load that I call CIRec709F. It's basically a BT.2020 profile with the filter engaged and then I use the Lumagen to dial in a nice Rec709 LUT to get great results for Rec709. Without the filter, the NX9/7 is almost always undersaturated in green on Rec709
Aside from just the bad RGB separation there is also terrible nonlinearity in the gamut that can not occur in nature. There is still an active CMS. Also, attached to this post is a photo I took of the screen. It shows me feeding the projector YCbCr 422 with the projector forced to YCbCr444. As you can see the grey steps pattern is really messed up. There should absolutely not be any blue steps in the pattern; all the grey steps should be the same color.
Because of this, I have been considering modifying the NX9/7's so that the filter is simply always engaged and never gets moved out of the light path. That way I could use the native mode with no filter and just always have the filter engaged. This way my clients wouldn't have to worry about the hack.
I was already planning to test Native mode with no filter, but your experience has certainly pushed me along in that direction. I will give it a try today.
Thanks and kind regards,