Stealing... Hard to steal things like an "arcology planet".
But there are lot of different cool stuff to be stolen.
Does not fit a SS style, tho'.
EDIT:
Worst thing - all of the texture I found, are flat with bump/normal map. Does SS able to use things like that?
An entirely artificial planet or one covered completely in artificial construction wasn't what I had in mind. There is no precedent for this in the lore, and if you do the math a world-city covering the entire surface of even a small planet would likely accommodate trillions of inhabitants, which isn't possible given the maximum market size in starsector.
I was thinking more along the lines of a planet with a single enormous city on the surface that takes up a continent-sized amount of space. Depending on the texture created, it could either be a sort of eco-focused arcology that coexists with a terran biosphere, or a self-contained megastructure with energy/resource requirements that decimate the existing environment, turning the world into a barren rock with a single gigantic dome enclosing the arcology.
Some of the possible benefits for it that I've considered would be massively increased population growth, increased income, increased stability, increased ground/space defenses, or the ability to construct unique buildings/industries only applicable to a massive arcology.
As far as the texture goes, I would need a texture that at least loosely fits with the description above as well as SS art style, plus the glows overlay for when the city is on the night side of the planet (this would be crucial as the player should notice the giant arcology on the surface of their planet without opening the colony screen). I think the engine automatically creates the atmosphere and other effects based on spec settings without a bump map, etc. being necessary.