Interesting results. In rawproc, to even get close to the relight shadow distribution I needed a rather aggressive curve; here’s a screenshot that tries to capture the difference:
In the processing chain up to the curve, I kept the original proof raw conversion except to remove the blackwhitepoint scaling, and I added a camera space -> working profile transform. Thing is, the upper values are maybe too saturated in the relight rendition, at least to my eyes.
Your thread has come at an opportune time for me, as I’m working through this very consideration in figuring out how to use the new camera. It goes into a “one tone curve to rule them all” sort of mental discourse (ha, there’s a fancy way to refer to ‘talking to ones self’… ) and the never-ending quest for reliable ETTR.
With regard to such tools in rawproc, I’m actually going the other way; 0.9 is going to remove my simplistic shadow, highlight, and contrast tools, as I now prefer to do such manually with a spline curve. But such considerations are taking me to a “dark place” regarding my curve tool, that is, what do I need to do to get it out of the old 0-255 paradigm and allow one to construct proper curves over the high bit-depth display range.
I need to update my Photoflow AppImage; is relight in your nightlies?