Skyscrapers

  Here's a render of a skyscraper duplicated a few times, it actually seems quite easy to make a skyscraper, look at a reference image, make a layer, array it upwards a bunch of times, add innards, add lights, and maybe some roof details.
  There's only 3 materials in this render, one of them isn't visible (it's for door handles that are out of view), one is the windows, another is a very basic material for the solid parts of the building. The glass marial is the most complicated one and there are no textures.