That's exactly what I thought and saw with color picker - MadVR seems to be pushing blue. Everyone at AVS seems to think I'm nuts / blind....
You posted screenshots at AVSForum and we told you what we saw. On my LG 4K monitor here set to rec-709, as well as on the 4K display of my Dell XPS 17, I see the JRVR picture yellow/brown, and the snow in madVR white. I have 15 years of experience calibrating, and I can usually spot a wrong white balance on a calibrated display.
I posted to defend JRVR on a few occasions in the AVS thread when I thought it was being misrepresented or unfairly evaluated. I would do the same for madVR.
I don't see any white balance issue with madVR set up properly on a calibrated NZ8 (P3, D65, gamma 2.4, using a C6 profiled to an i1pro2). I'll check that specific shot with JRVR when I find the time, but there is no need to make it sound like it's "us against them".
You're also using non-optional madVR settings and your display is uncalibrated.
Comparing tonemapping with random settings on an uncalibrated display is only saying what looks nicer to you.
I only stepped in briefly to defend JRVR again and explain that settings in JRVR (especially curve selection, gamut mapping and contrast) can have a significant impact on the final picture as well (just like with madVR). Some of the minor clipping / loss of detail in your JRVR shots could be due to poor settings in JRVR, especially re contrast enhancement or the spline contrast settings if you select spline manually.
haasn would need to look at the colors in the original HDR stream as well. It's snow. What tells you that snow/ice couldn't have some blue in the original content? I think you used the 1,000nits version. Please confirm so that Haasn can check in the same stream.
haasn, please could you look in the latest S&M UHD bluray disk (2nd edition from, 2023, there were some issues in the first edition) and see if there is blue in the original content as well?
In this case madVR would be correct and JRVR would be wrong.
I haven't evaluated JRVR properly yet, only selected the most appropriate settings in my case, and I reported that it looked very promising and that the progress in MC31 was impressive.