Invisible Cities : Digital Painting : Buildings

I feel as if this exercise has helped me with developing my building thumbnails because I was originally struggling to come up with original structures which blended in with the tree cities organic shapes . I'm not sure how I feel about some buildings as they were my original sketches and I had no clue what my plan was at the beginning ,however, when collaging my buildings together I got a good idea when it came to scale and I feel my city has transformed to an open world village to a city.