D75_5446.NEF (25.9 MB)
D75_5446.NEF.pp3 (13.6 KB)
(no particular licence for this picture, of course)
So, trying it out for myself, with this data
spydercheckr_reference_data.pdf (200.8 KB)
after picking the WB on the grey card exposed to the sun, I adjusted the exposure so the brightest patch would get to L = 97% approximately.
The other grey patches fall pretty well where they’re expected to, in my opinion (not talking about the a and b values, though).
Notes:
- camera is a Nikon D750,
- profile is auto-matched,
- only
base tableis ticked, - the processing profile is derived from neutral.
→ this seems to achieve neutrality in RT.
A few minutes before that, with a different lens and orientation, the sun was behind clouds. With a similar processing approach, I get some compression in the shadows (i.e. they appear lighter than they should, but that could be due to the hand-held and imperfect setup 
)
