I noticed a few missing features, such as being able to drag sectors around, or be able to select a vertex that's not exactly on the grid you're working with. I also spent the day actively trying to crash it or make asserts fail. I managed to do it a few times, but it was more reliable than I had expected.

I've also been experimenting with how to represent a thick forest with as few polygons as possible. I think I got a good solution where trees aren't individuals, just trunks, and the leaves of all trees blend together.