Some of the effects this creates look "realistic" in the sense that they resemble real watercolors. However, the painting model seems rather unrealistic, or at

Some of the effects this creates look "realistic" in the sense that they resemble real watercolors. However, the painting model seems rather unrealistic, or at least how it relates to the settings. E.g. I put "water" on 100% and "pressure" on 20% and get a weird spotty dry-brush effect. That doesn't make any sense. Not even sure what "pressure" here means, as you usually would only apply pressure to a brush in order to widen its stroke width. The other thing is that colors don't interact the same way they would in reality. You can paint an underlayer and then paint over it with a very watery other color, and it just covers it up - in reality the watery color on top would a) be much less saturated and b) let the underlying color shine through or if you're unlucky c) smudge the already applied pigments below. I also noticed that the water dripping seems pretty random, something I painted a few minutes ago suddenly starts flowing down the canvas for no particular reason. The description says "with a focus on real watercolors and acrylics", but then again those are quite different painting models, it's unclear which one you are even using here.