Here is -4 stops with rev044_B Rec709 in Resolve (no RGC)
(I used _B version, as a better one in terms of handling this artifact)
Maybe it’s better to use a synthetic gradient for that? If I turn on RGC, it helps a little bit, but if I also add saturation in ACEScct using old Saturation knob (just a regular CDL-like saturation) from default setting 50 to 60, the transition becomes more visible again. I think, even if you’ll manage to somehow display this particular image without the sharp transition at all exposures, this balance will still be very fragile.
