Where to buy:
https://www.renderosity.com/mod/bcs/m28-modern-building---extended-license/120488
Modern building
-Model built entirely with 3-sided polygons.
-Although this model includes separately named surface materials, this model does not include any coloring or textures: all surface materials are set to white. No textures, shaders, or materials are included with this model.
Software:
UNREAL Game Engine, UNITY
Renderosity