Unreal Engine (UE4, UE5), versatile Blueprint for creating randomized Sci-Fi buildings.
Included now in "Second Edition" update for "Amazing Sci-Fi Vol.2" on Unreal Engine (Epic) Marketplace!
1 to 5 "towers", with optional connectors between, also with optional decorative "elevator lights" moving inside towers. Optional steam effects, optional Helipad.
Of course, Sci-Fi is just my preference, Blueprint can be used to "pile up" any kinds of meshes-modules you choose.
This will be in an upcoming update for my existing asset, "Amazing Sci-Fi Vol.2", available on Unreal Marketplace:
(after update, it will be posted also here, on Artstation Marketplace)
https://www.unrealengine.com/marketplace/en-US/product/amazing-sci-fi-modular-environment-vol-2