oh!! I use Clip Studio Paint, Sai 1-2, and Krita! As for brushes, my god, I have over 500 brushes but the most I've used is the airbrush (changing the settings constantly) and any/all pencil brushes! My favorite brush for sketches is this marker pencil brush on csp, its id number is 1953592, and for rendering sometimes is the bong pen (lol) on csp, and its id number is 1783228!