LightIllusion is always looking for different ways to assess display capabilities, and have just added a couple of new features/changes to the LightSpace graphs.
They are actually rather obvious and they will be included in the next release in a couple of days or so.
Anyway, the first is a change to the 'Stimulus Level' filter for the CIE diagram - basically, it now works as it should!
It now shows 'slices' through the CIE diagram 'Luminance' (z axis), displaying the gamut points for each slice. This is basically showing the Volumetric colour capabilities of the profiled display.
The second change is the ability to independently plot any 'Drift' patches in a profile, to see the underlying stability of any given display/probe combination.
During display characterization procedure, when you have enabled the Drift Compensation feature with 20 value for example, LightSpace it takes a one White measurement per 20 other color patches and at the end you have the option to include (or not include) these data to the generation of the 3D LUT correction, for the 3D LUT correction to include the shifting from display drifting during the measurements, for the color engine to get better data and generate more accurate correction. This helps a lot projectors or Plasma/OLED which are not stable output during the hours of measurements.
Here are some examples of very different results. This is from a BON broadcast display, which had not been left long enough to warm-up before profiling:
Here is a Dreamcolor display, showing just how generally unstable it is:
Here you see a Pioneer KURO, it's drifting over the time linear, starring with higher output which is dropped linear during the measurements, while the output is dropped, the chromaticity is changing a bit:
Here you see LG 2016 OLED, the output is drifted, display gets brighter over the time, this profile performed with Wide Gamut option selected:
Here you see LG 2016 OLED, very unstable output, this profiled performed with Normal Gamut option selected. Normal Gamut adds an LG processing (some kind of 3D LUT correction/processing from LG internally) to provide a colorspace coverage closer to REC.709 ....this graph shows how LG internal poor processing affects so much the display stability. This why it's better to use Native display gamut when you perform 3D LUT display characterization, we don't need any added display processing to affect the display performance: