Add a mask component, in this case Intersect Color Range, I select the Blue
Add another component, in this case A subtract, color range, click on a cloud (yes, I know I could alter a different way) note, Yellowstone Geyser Basin so lots of steam. Good, what I want in the mask is included, what I do not is excluded.
Go to sliders, cool it down, darken a bit, good, now to apply a grad.
Now I add a linear gradient. Problem, Cannot adjust exposure for just the gradient.
The sliders do not just alter the individual mask component. No matter where in the mask structure you click on. The the sliders alter the entire mask, not just the mask component.
Yes, I have read and watched material on masking, maybe I missed something.
Current solution is to create a separate linear grad mask.