In that case: It would be very nice if the asteroid field "box" didn't have to be axis aligned.
That way placing an a little wider field across a map would be much easier. Because this way the field has to be axis aligned, so if I want it
diagonal to something I have to build the rest of the mission diagonal instead. Hope you know what I mean.
I know an axis aligned box is much easier for testing intersections, but if you are on it and think you can implement it that way too... would be cool.
(Come to think of it, a sphere/elipsoid as boundary would be nice as well. And even easy to test for intersections...