Because there's no"hardness by pressure" setting, I made this brush as an experiment to see if it's possible, and it is! Took me a while to figure out though. It's a little problematic so I hope this can just be a simple setting you can tick like the brush size sometime in the future. You can switch off the "Color Mixing" checkbox in the "Ink" section to play with the opacity setting instead.
Using the brush with the size of 100 or over may cause your strokes to lag, just a head's up for those with low-spec devices!
