I used the city block I already had in my Dinotopia image. I adjusted even more of the 165 shaders (thanks to Bobby, who gave me the tip to use PoseRay to simplify the shader stuff. I wish I had known this before!!), and used several instances of it, rotaded each one of them, so that hopefully it's not too obvious, that it's the same model.
I created a mask for the road marks in Photoshop by using a top view orthographic render of the scene and broke it up with a PF.
I added a lot of more stuff, and in the end I'm happy, that I worked in real scale from the start. Whenever I use a downloaded model I scale it up or down correctly BEFORE I import it into TG now, which is a great time saver! Adding a thin cloud layer as haze with "receive shadows from surfaces" checked increased rendertimes a lot, but I think it's worth it.
The image took about four hours to render in 4K with Detail 0.8 and AA of 9. Given the fact, that there's a lot of stuff (including some reflective shaders with RT on) in the scene, it's not too bad, I guess.
Btw, all models in this image are free ones.
