Originally Posted by bobof
I'm just getting set up with my new Lumagen Pro and found your post useful. I found the car blue highlight scene at the beginning of Mad Max Fury Road but I'm not familiar with the movie - do you have timestamps for the explosions too? I'd like to play around with them myself.
I have Lightspace HTP. For now I'd just loaded in the plain 2.4 SDR 2020 LUT for my projector and trying Intensity Mapping, but of course I see the same blue highlight issue on that car (be nice to see if this can be improved in a future version of IM). Out of interest, when you're making dedicated LUT for HDR conversion in Lightspace, how many LUTs do you have for HDR? Just one or several? I've previously hacked around with my old Lumagen 2143 doing HDR conversion in LUT so I know my way around Lightspace for that.
You can find plenty of those scenes between ~0:28:00 and 0:30:00. My first picture is at 0:28:29, and the second 0:28:37.
To cross-check if the blue highlights of those chome elements or the rather dull explosions are caused by a failed LUT I uploaded a plain cube without actual calibration data. The blue highlights remain even then. The same goes for the explosions.
In the madVR thread it is suspected that the blue highlights are an enconding issue. That alone doesn't explain why they turn blue in some tone mapping solutions but not in others.
After the changes last year I switched from LightSpace ST.2084-LUTs to IM, because I found it more flexible without the need to always connect my PC to do some changes, even though I liked some aspect of the LightSpace tone mapping better.
Before that I had one ST.2084-LUT for 1000 nit mastered discs and one for 4000 nit mastered discs. Currently I have one CMS slot reserved for IM (PJ in low lamp mode), one slot for an ST.2084-LUT (4000 nits), one slot for some Arve curves ("UHD Rec.2020", Gamma 2.2) and one slot for IM (PJ in high lamp mode).
I am absolutely certain that IM could be improved and it is "only" a mathematical issue.