Alien-style movie trailer development thread

After going a bit nut for a few days doing the new digital actor which won’t even be used in this verion of the trailer, I have finally gone back to doing the last few scenes. Which means procedurally generating citiess. Which means torturing my poor, poor computer with massive workloads. I am currently trying to make it add a single level of detail more before rendering for real, but before that hopefully succeeds, this is the test of the initial city shoot: