I admit I never considered to build a Sphere World, and I am probably not going to even try. Unless I am trying to build the fabled Sphere World filled with Cultural Centers from Proportions that is.
Joking aside, I believe they need far too much effort to actually be cost-effective. You will need Stellar Manipulation 8 for a Sphere World (5 for a Ring World), then 21 bases in orbit around a sun plus a few construction bases (11 for a Ring World) and then you will need quite a lot of turns as these 200 facilities are somewhat slow to build. Of course, such a world is *very* profitable once fully developed and protected, the problem being to reach this stage in a multiplayer game. And that is a big problem as few multiplayer games actually reach the 200 turns mark, let alone 300 turns when taking into account the time needed to "create" the Sphereworld.
Re: Ringworlds and Sphereworlds
Threaded Mode