Is your feature request related to a problem? Please describe.
After merging #2515, when viewing a robot moving continuously in a certain direction at either 32 or 64 ticks/s, there are noticeable stutters, presumably due to the game (a) loading new world tiles every time we reach some new ones, and (b) drawing new view chunks as they come into view. This is not a huge problem but it would be super cool if it was smoother.

Describe the solution you'd like
Ideally, we should (a) slightly increase the radius at which we load new world tiles and the radius at which we draw view chunks, and (b) do the loading/rendering in a separate thread, so that by the time we actually need them to render a frame, they are already available.

Although these are quite similar in some ways, the mechanisms by which we achieve them might be different, so it might make sense to split these out into two separate issues.