Flare: with a pen, tilt it to tilt the can (the line opens into mist on one side)
Experiments
Keys & mouse
Left paint · right drag look · WASD walk Wheel size · Shift straight line · 1–7 colours Ctrl smooth curves · Flick: let go right after a quick move 0 eraser · Ctrl+Z undo
C next preset · pen tilt flare