Okay, I just tried to post the link, but apparently I have to post at least 5 times to include a link and I haven't done that, so I'm sorry, you will just have to go to the appropriate forum and find it. But the post is in this catagory:
Display Devices > Digital Hi-End Projectors - $3,000+ USD MSRP
Look at post #1799
, I found it on page #60
at the bottom of the page. The post is by Christian Spiga, so thanks go to him. Those are the settings I used to start with, then just changed a few things to get more of a picture I liked. It's still not perfect, but it is a lot better in my opinion.
Also, something I didn't point out in my original post is I use the new Nvidia Shield Pro to stream all my content and when I watch something in HDR on Netflix (the show Our Planet, for example), it looks amazing. But when I watch an HDR movie on Vudu, or even with my 4K Blu-Ray player, that is when I have the issue of things not looking that great. Using these settings as a starting point, I got the picture to look okay but it still looks like there is a slight haze over everything. It's like looking through a pair of dirty glasses. Hopefully that makes sense. I could definitely be wrong, but from what I've read, it looks like the P1 just has some HDR issues anyway. Hopefully an update in the future will help.
I hope that answers your question. Please let us know if that was helpful to you or not. Thanks.