Hi @RamonM ,
I haven’t used this kind of brush and find it quite difficult to produce something, it requires practice and understanding on how it works and how closed lines can produce different results.
Anyway the brush super interesting at the least!
One thing I wanted to ask is regarding the Opacity configuration, I found that it seems not to be working as configured.
In the configuration, the Opacity is set with the pressure from transparent to opaque in a linear fashion, but when drawing with the pen the pressure seems to be changing the density and not the opacity. Only when changing the Strength (or opacity value in the slider on the toolbar) it seems to reduce the opacity.
Below is an image with the Strength value for the opacity changed, still using the pen from transparent to opaque as default.
Please let me know if I’m not too clear or need some other test.
As always thanks for the brush!!!

