@ Mark D Segal
Totally agree about the reversibility issue. But my understanding is that sooner or later Photoshop sends every image file through CIELab, even with RGB>RGB conversions, so you could apply LAB-adjustments to the file (not the preview) at that later stage, for example together with conversion to output color space.
CIELab probably isn’t even close to perceptually uniform, but that CIELab_to_UPLab.icc by Bruce Lindbloom doesn’t seem to be such a bad workaround. I think RPP is using this file, and to good success. I don’t think adjustments in RGB don’t work at all, and maybe its construction has a lot of advantages, but I am a little more comfortable with a clear separation of L* and a*/b* curves. Furthermore blending modes in RGB do not seem to work to the same effect (see also posts by Schewe and jrp) – which is funny since to my understanding under the hood Photoshop is somehow going back to something LAB-ish anyway. I also like the effect of color separation.
Thanks for suggesting Topaz Adjust. I will have a look at the trial version.
I am more of a Capture One guy and never got used to LR/ACR. Nothing based on facts, just personal liking.
Thanks for your posts.
"and then adjust the blend-if sliders of the layer properties to feather out the effect on the more saturated colors"
Didn’t try that before but works like a charm. Again thanks a lot!
Thanks for the link. I will have a look at that tool. (And I really don’t care whether it’s connected to "DM" or not since I’m too young to remember when those LAB/RGB wars took place).