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I've already read about flood fill, but was sceptical. With one layer for contour and color it makes sense now, thanks!

Well, that was my first thought, but consider drawing two overlapping, filled circles. Filling these is not that easy (and fast!) to accomplish.

I'm pretty new to TVP but already got some simple animations to work. Now I'm trying to draw a filled circle with some border (e.g. black circle filled with white). All I'm able to get is either an outlined or completely filled circle. How could I accomplish this?