FR: Hardcode scalable sphere and cube for volumetric nebulae and asteroid boundaries

Similarly to how Freelancer handles asteroids and nebulae as scalable "zones" using an invisible deformable sphere/cube mesh, this proposal would introduce a sphere and cube for freespace which can be scaled independently on all axes and, ideally, rotated.

These new boundary meshes would be able to define the dimensions of asteroid fields and volumetric nebulae which would look like this - the white ovals in the demonstration gif here are spheres which have been scaled to accomodate debris, asteroids, and nebulae throughout a game area.

https://i.postimg.cc/NFWj7cNX/flms.gif