These are from the “Tawnar City” set from DeathKill Miniatures. You get five buildings for $3.57, which is a pretty good deal. In addition, the terrain is designed to be hollow, allowing them to stack on top of each other for easy storage. The buildings have a strong Eldar or Tau vibe, which is to say alien curvy architecture.
I’m still slowly printing out pieces for Isolation Protocol, and with a small problem of a clogging hotend, I’m behind schedule on that. I’ll be posting pics of an update soon.