i like the symmetry feature of that program(missing on mypaint ). In mypaint you can have symmetry (only for straight lines) if you change: [I] in lib /document.py line 181: N=1000 to N=10 to avoid ghost lines and duplicating line187-191 where changing x[i] to -x[i] for horizontal symmetry or y[i] to -y[i] for vertical. I try to figure out symmetry for all kind of strokes,I have problem with that interpolation, a menu for it ...Someone?...help? I want to have all kind of features realizable in python.