Welcome to TVPaint Community forums !

I checked past questions for this before posting this. 2012 was that last mention of it. - Is there any kind of auto-tweening function in TVP for hand-drawn line work produced on a tablet? In particular for keys that are quite close together?

Thanks,
-Bruce

Nope, there is not. We studied the possibility, but it works with simple shapes only. When you have more complex characters, it's a total mess.