Thanks to everybody, now I have a lot of material to study:)
It looks to me that with RT it’s easier to get to a “normalized” result, in this case. It’s another tool I need to learn.
Besides, I wonder what is the true difference between LAB curves and RGB curves. I mean, I know they work in a different color space, and I grasp the general idea of how a curve works, but if I compress them the same way, the results are hugely different.
These are the curves in GIMP:
and this is the result:
But if I manipulate the LAB curves in DT in the same way, that is removing the empty space before and after the histogram:
the result is this:
So, not only the curves are simply in a different color space, but they also operate in a different way…