Tone equalizer - strange mask contrast compensation behavior

[Vente (Dávid 🦅)]

Hello,
I have a problem regarding mask contrast compensation in the Tone equalizer module. It should dilate the mask around the central -4EV point evenly. But instead, lower values are significantly more sensitive than higher ones. It is visible in the attached screenshots that a change of only +0.08 EV clips lower values while higher values barely move. It is set to everything default pretty much (EIGF and RGB Euclidean norm).

adding contrast +0.08 EV

Before I open an issue on Github, I wanted to make sure; is this the intended behavior? It is a bit tedious to spread the histogram like this (after adding contrast I have to add exposure as well and then add some contrast again). Got any tips?

[priort (Todd Prior)]

This is just the histogram of the mask not the image data so it can be a little off and still be fine …in fact I often use two instances each skewed the opposite way so that more of the mask covers each of the highlights and shadows… Is that true that it will be evenly shifted… I see different behavior based on the luminance estimator used for the mask and it changes dramatically when you switch from one to the other but maybe… I guess I should go back and look but really I have never looked at it in that precise a way as I just move the mask to best cover the range I want to target…