It's getting somewhere:
The background buildings are partially from the game, partially self modeled after game models and partially from SWTOR. There's still some models and details like smoke from the chimneys missing but the overall look is pretty much what I want already.
I'll also add some 2d backdrop buildings to bridge the gap and blend between the ingame terrain and the skybox. Otherwise the difference is just too obvious especially in the Central Zone.
Now, I don't know alot about the lore of M4-78 so if this industrial and dirty look is somehow completely wrong, please let me know ASAP and I'll try to design something new.
I will make them a little softer but not as much as in your image. I personally prefer them with hard edges and that way they match the ingame godrays better as well.