Last night i watched transformers, the last knight in hdx on vudu. I also did some extensive viewing of gaurdians v2. I also used the lightspeed setups for hd and hdr. Michel Bay must losing his mind with all of the aspect changes in transformers.
Watch transformers last night, I tried the THX setup at contrast +10, brightness -10, manual iris -6. The presentation was outstanding. It was so good, I watched the whole film before I started some basic calibrations. I would note the natural picture mode was also very good with just some contrast and brightness tweaks. I had watched these with the INPUT grayscale set to standard. I also played with a custom 2.4 gamma which was looking pretty good.
When it came dialing in HDR, I built on what I learned on the 520. I used Ted's Lightspeed disc to set up the st2084 gamma. I left the main contrast and brightness both set 0. I switched to INPUT grayscale to enhanced mode. Then I went into the st2084 gamma. To get the Lightspeed patterns right for 16/256
Contrast = 0
Picture Tone = 0
Dark Level = 5
Bright Level = -5
I loaded guardians v2, and just like on the 520, these st2084 calibrations with the lightspeed disc gave me a very washed image. And just like on the 520 I made additional changes to st2084 curve watching the movie.
I used the clouds in opening scene to dial in picture tone and bright level, and then used some of the highlights later in the monster fight near the beginning. The lower end did not have as many issues as the upper end. Here were my settings that made the movie look awesome thru out without any crush on the upper or lower end.
Contrast = 0
Brightness = 0
Picture Tone = 13
Dark Level = 5
Bright Level = -3
Now these setting do crush on the Lightspeed disc, but not on Guardians v2. The image was very bright without loss of high contrast detail and a good dark low end with good shadow detail. Once i get the spyder5, I will measure both of these adjustments to see how they track.
Regarding the washed image after letting up with lightspeed disc, I'm wondering if using what that disc is the problem. I'm waiting on my download of the diversified files and try tweaking st2084 again.
I also took some time to check out the high bright mode. While it does offer a boost in lumen output, it does so with a significant green shift across the grayscale. I 1st thought maybe it was just color saturation, but it's more. I tried adjusting the gain green -15 and offset green -15. And while this appeared to balance the colors on the planet scene on quill's dad's planet, when I check a grayscale ramp, it was very red through out.
Not sure what can be done to get back to 6500k range with high bright mode. When I get my spyder5 sensor, I'll give the bais and gain settings another try. I also wonder about the color management and how that might be able to address the color shift. Although when gain and offset tweaks were adjusted to make HDR and High Bright similar in the appearance of collor, nearly all of the extra lumens were lost.
I have a couple of questions...
How do you all set the Input Signal Input Level? Standard or Enhanced? Enhanced definitely lets me grayscale range better, but is using the enhanced setting a mistake?
I'm curious if anyone has tried vudu 4k UHD HDR movies yet? How do they compare to HDX?
My concern, the UHD HDR version will require more compression, and while some additional resolution will be present, what artifacts might extra compression do to the rest of the image? I'm curious is anyone has made this comparison.