Ultimately, we can probably ask for something along these lines:
- Can we generate a luminosity mask for use from within RT?
- Can we have that mask applied in a new module that allows us to modify tones?
- Can we have control over which tones of the mask get used?
I could see three sliders being used here, maybe four.
- Highlights tone control to pull them brighter/darker
- Shadows tone control to pull them brighter/darker
- A slider to control the crossover point of the luminosity mask.
a. Optionally, two sliders - one for crossover point, the other for tonal “width” that the mask is applied to.