Weird Dif EOTF with Default Unity LUT [Fixed]

Do the following

• open a new profiling window
• in the Probe tab, select Virtual Probe, connect with it and select i.e. UHD Rec 2020 as OETF
• in the Settings tab, select the same Colourspace as Target, Default Unity as active LUT and Patch Scale/Resolution Legal/8bit
• in the measurement tab, load the FullRange Patch (attachment) and measure it
• you will get a weird Dif EOTF Diagram
• now change Patch Scale to Full
• and the Dif EOTF Diagram is as flat as it should be

So, what's going on here. An does this have an effect on LUT pre-evaluation?

The weird DifEOTF

The flat DifEOTF

Attached file: The Patch File

Ah - that is just associated with the Virtual Probe.
If you change the bit-depth too you will see the zig-zags also change.
Mind you, it probably should not do that.
We'll look.

Steve

Issue found and sorted.
It was indeed purely related to the Active Probe, Active LUT, and Legal Range combination.
Not an issue anywhere else.

Good find!
Will be fixed in the next release.

Steve