Smiker, I had the transparency going, but I couldn't figure out how to make the undraw work. I ended up with something like this:
I can see how I'm meant to do it now, but still, in order to make the transparency work you have to turn it on, pick a colour to get rid of and an undraw method, and do all of that separately for each frame, which is silly. Why not use the same settings for every frame, as default?
Bengoshia, I'm thinking these should display at 2x or 3x. It's kind of arbitrary, because it depends on your screen resolution. So, uh, how do I make the animation smoother?