but the problem is that sometimes it doesn’t recover/protect, but it has the opposite effect… fwiw, initially I called it “detail”, but then people complained that sometimes it didn’t preserve the details…
I’d expect it then to start at 0 at the left?
normally, you should not need to go negative. values less than zero are only if you see artifacts.
By the way I notice some decidedly nonlinear behaviour in the slider, is that intentional? Is it that from -5 to 0, small detail is increasingly protected, while at 1 and above a much wider contrast area is protected?
yes, indeed this is the case. that’s why negative values are usually not needed, the effect is subtle enough that it shouldn’t cause problems in most cases. but for the odd cases in which it does, you can lower it or turn it off completely (slider all the way to the left)