I've been working on a graphics editor in TGF1 (don't mind that as I can use MMF2 if I absolutely need to), and while I have a few neat features, I sorta skipped one much needed thing to get there.
How to make smooth lines? .. I'm pasting into the background and it just doesn't do it fast enough to keep up with the mouse's movement rate. So it results in dots if you move the mouse too quickly.