Hello :

I get a lot of straight sections which look very digital/fake when doing tight circles with the oil brush. Like a little octagon or hexagon. I suggest increasing precision for slow movements (rather than simply waiting until x pixels of movement occur) or using some kind of interpolation/smoothing to make tight circles more natural looking. My Wacom stylus has way more precision and tracking that what is being utilized, and zooming in does not really help.

I will post a picture if there is any confusion as to what I am referring.