Thanks @gadolf, looking through the settings people have used is one of my favourite parts of Play Raws (apart from the pictures of course!). Its great to hear that someone is learning from my efforts.
Good point. If you want the numbers to be compatible with an ACES workflow, then you need to have your data in linear ACEScg for the Colour Adjustment. You can do this by changing your working space to ACEScg in the Raw Developer module (Output tab) if you don’t want to have multiple colour space conversions all over the place. Having said that, ACEScg and Rec2020 aren’t very different and the results of applying colour adjustments in either are quite similar (to my eyes at least) - the numbers may be a bit different but you’ll end up with the same result in the end.
One thing that may be making a difference in the blown-out region near the sun – do you have “Clip Overflow Values” turned on in the cc-to-ACEScg and ACEScg-to-cc layers?
The conversion to sRGB at the top of the stack is because I find it useful to adjust the gamut mapping parameters when converting to the output space (the colour conversion in the image export doesn’t have this feature and you couldn’t preview the results if it did).
One subtle point on the sharpening layer at the bottom of the stack:
I’m trying to reproduce the capture sharpening feature recently added to RawTherapee, and it works very well indeed. However, Photoflow’s RL sharpening can’t handle negative values (you get black squares on the output) and it clips values > 1. I put exposure correction AFTER the sharpening to get around the clipping (on some files you may want to put -2 stops exposure before sharpening and 2 stops after to avoid clipping). If I move the Basic Adjustments layer to before the shaprening, then all the detail in the sky gets lost. Putting a defringe layer before sharpening helps if you have lots of specular highlights in your image as otherwise they get nasty halos. If you use defringe, you’ll need a clip values layer to deal with any negative values that the defringe may introduce which otherwise upset the sharpening.