So I've been having a bit more of a play with NX-D.
And interesting 'observation' I just noted:
I downloaded some more sample Z7 NEFs, popped them into CNX-D and had a look at the picture control settings.
I note that they are a bit more advanced than the D850 Picture Control settings.
Both images from both cameras can be made to look 99.9999% identical when settings are 'equalised'.
I put equalised into quotation marks because they're not really equal, just the same settings applied.
What's different:
D850 has a single sharpening setting, from 0-9(ie. 10 levels, 0 being off)
Z7 has two different sharpening systems, one of which is the sharpening as the D850 has, but it also has an additional 'mid range' sharpening tool.
And further to this is that the slider/values dip below 0, and into negative territory, where the values range between -3 to 9.
Both still have the clarity slider as well.
More accurately the Z7's Picture Control has a Quick Sharpen tool, that controls all three sharpening tools. The Quick Sharpen merely controls the Sharpen/Mid Range Sharpen and Clarity sliders at the same time(as in a batch mode style). Quick Sharpen has a -2 to 2 range
The other point of note with respect to PP control is with respect to noise reduction.
On the D850(as well as just about every other DSLR NEF file I've had played with in Nikon software, you can turn off NR 'completely' using the Capture softwares(both NX2 and NX-D).
So if you shoot at high ISO, you can turn NR off, and see the results of that setting(increased chroma noise and increased acuity in fine detail)
Nikon have changed it with the Z7.
With the same ISO 12800 sample images, there is no option to go manual in the NR tool. And it's obvious that there is some NR applied to the image as it's relative chroma noise level is less than the similar D850 file, and it loses quite a considerable amount of acuity by comparison too.
SO it's very obvious that Nikon won't allow any manual NR tweaks at specific ISO levels with the new Picture Controls made available.
The upshot(or downside) to this is that in some cases(red details on red background in the instance I played with), the Z7 loses out on detail that the D850 collects .. all due to the inability to switch off the NR function completely on the Z7 NEF file.
note: I only downloaded the ISO64 and ISO12800 files(from IR) to play with .. so I don't yet know at what ISO setting Nikon will allow NR to be manually set.