Inputted 50 real peak nits with the assumption that he screen gain is 1.0. A variant of this screen was measured 33% lower than claimed.
Can the X-Rite ColorMunki Display measure screen gain? Is a 1.0 surface required for comparison or can the light coming from the projector be compared to the light from the screen?
Used 200-250 real nits for the LCD monitor instead of 300(specification) because it's 10 years old and I assume the backlight has dimmed. The guide states that Enter the Minimal target nits / real display peak nits (50-150 recommended for most).
Is 150 an upper limit or should this be the peak nits of the display? What if a display has 500 peak nits?
Monitor gamma after calibration with the HDR templates is 2.4. 0 compression limit, 100 dynamic tuning, the rest as in your screenshot.
The monitor is an IPS and the ALR coating on the screen do raise the black floor (both have an IPS glow effect). Seen 25fL/85 nits recommended for HDR on projectors, which is not that much. Activated BC (27% more brightness), set the real nits to 67. It did not make that much of a difference. The calibration still set gamma at 2.2.
I could maximize the nits to 116 (with new lamp, closest positioning), and 164 with the other modes (which have BC on), but that would still be less than the monitor.
The issue with the dark scenes being too dark is that it shows up very similar on the monitor, which is supposed to be brighter than the projector.
Desaturation may not be the correct term, but there seems to be a loss of color vibrancy/brightness, most noticeable in dark scenes. Especially when compared to the SDR versions. I understand the algorithm compresses the nits, but there are a lot of dark scenes in movies. Grey blacks due to the display's I can understand, but the colors should be brighter. Perhaps it's a studio's creative decision with the 4K releases, and/or my subjective impression.
Soulnight's tool creates an Original folder when no previous measurements are present. What is stored in this folder, the first measurement?
There was a thread which explained the MaxCLL, MaxFALL, and all the other values, but can't find it.
(FALL algo) in this post Link
claims And if real nits is lower than the no compression limit, it does not play any role except as lower limiter.
So at 50 peak nits the 50 is a limiter for no compression?
With the exception of dynamic tuning/100 rather than 50, is this accurate?
Just a quick reminder on the FALL algo formula:
Below the "no compression limit":
Target nits = Peak nits
Above the "no compression limit ":
Target nits = no compression limit + %dynamicTuning/50 × 2×Fall
So the non compression limit is used as an offset/start value in the formula.
Also important, the true "no compression limit " which is being used is equal to:
max (entered real nits, entered no compression limit.)
So when neo-xp says zero no compression limit, he actually uses 150 (his entered real nits) instead.
If someone has only 50nits like myself, I would still advise to use a no compression limit of 150 since it is also used as an offset. Minimum should be 100 nits ( and I have probably already hardcoded that minimum).
Used 0 so far, and in dark scenes there is no difference. So is the compression limit 50 nits (for 50 real peak nits)?
In the formula for the target peak nits, does this part Max(no compression limit, min target / real display peak nits)
refer to which ever is greater, the no compression limit or real nits?
What about in the Live algo, what if compression limit is greater than peak nits?
Not sure what overblown looks like ( with dynamic clipping in the Live algo), but in medium to bright scenes activating it (with 100 recovery strength) gives a brightness boost, similar to going from 100 to 50 dynamic tuning. Is this effect bad, because I like the increased brightness.
The files put through Soulnight's utility are darker (with/without dynamic clipping) (either FALL/BT2390) vs the Live algo without dynamic clipping. Algo's settings: 50 peak nits, 100 dynamic tuning, 100 clipping strength, dynamic target nits selection, Preset 3.
What does dynamic clipping do? In this post Link
it's suggested that it cuts some of the highlights. The statistics in the tool also indicate this.
I can't see any difference with the algo (FALL or BT2390) between dynamic clipping or without. In the two attachments, under master luminance the values are different - with the algo on the left, without algo on the right. Picture 1 is FALL algo, picture 2 is BT2390. Also can't see any difference, at least the files I've tried, between the the FALL and BT2390 algos.
What are % decompressed pixels? (in the expanded statistics).