I had always problems with creating Round Soft Brush even basic airbrush feels too hard.
I want to have brush similar as on example #2
There are 3 Brush tips to choose from: Default, Soft, Gausian.
Default and Gaussian initial dabs are to dark so i went with Soft (#1, #3).
But there problem. Softness Adjustment curve window is to small and its hard to get precise Falloff.
Adittionaly there are some artefacts in krita where stroke values are not really smooth.
300% zoom stroke #1 Krita
300% zoom stroke #2 CSP
300% zoom stroke #3 Krita
Do anyone have ideas how to setup good looking soft brush?