For the first 4 thumbnails, I created some quick collages using the buildings I have designed already. They may not be 3D yet but have allowed me to see that they work well with each other. I've also started to play with the colours a little so I can start to create the colour palette for the city.
For thumbnail 25, I merged 3 of my existing buildings together to make a bigger stately building. Combining shapes like this is really starting to add depth to my pieces. 26 was another pair of shoes connected together to make a huge apartment building, almost like a sky scraper.