Welcome to TVPaint Community forums !

I'm getting so close to finishing my 5-minute epic!

I'm including imported video in my last shot, but want to feather the edges to blend it seamlessly into my drawn animation. I can think of lots of ways but don't know how to execute them in TVPaint. Eg: can I feather a freehand selection? Can I apply a brush-stroke to a whole bunch of selected instances at once?

Of course. Just set the "smooth" range before drawing the selection (or use the magic wand). The nice thing is that you can add or subtract from a selection, and change this parameter each time.

feather = Smooth
so you can set a smooth value in your selection tool.

apply to multiple frames = ENTER-key
enter reapplies the last action of any tool to the selected range of frames

thank you both! I never would have got through this animation without this forum!