Here are some outdated development renders of the Dyson Sphere which will be featured in the upcoming .6 release as part of a new race.
The final format has changed, but it should give you all a glance upfront.
This sphere is presumably a energy collector with an estimated diameter of some 45km, harnassing a pulsar.
Its real purpose or function is yet unknown but it's suspected this is actually one of the smallest Spheres and much much larger ones also must exist.
For size references, a Teladi Phoenix M2 has been included.