This is nice and the masking functions of darktable are also excellent, but if I have to process about 100 out of 300 photo shoots for the customer, then I would like to do it without the elaborate masking as far as possible in order to be able to work efficiently.
The addition of primaries to the Sigmoid module has made this work much easier for us event photographers, as we often have to deal with unfavorable lighting conditions. This was also very nicely demonstrated above by @flannelhead l and it works very well in practice. This example with the vest is still one of the rare cases where it doesn’t work so easily and I wanted to know if that also could be addressed.
I like the Sigmoid’s nice function of color processing per channel and contrast, which means I can get very good results almost immediately without having to access the other modules too much.