I always had visibility problems in mind that's why it was originally designed this way (with the districts and the walls separating them). So from any given district you can only seen the current district and the Hub building. And when you go near the 'exit' of the district you can see the adjacent district plus the Hub. Also the main courtyards in the center of each district are a different case, as they are separated from the rest of the district, and you can only see the adjacent shells and the walls of the district. (Also obviously you can see the sky from everywhere and the Prin Pahts nexus from nowhere)
In fact I happen to already have a CSV file half-ready.. (obviously inspired by the city.CSV). So I have a pretty good idea of how I'll do this. It won't be easy to setup correctly but it should be interesting to do.
Right now if in the .fni file you use a "setYon -1" to render the Age backward, you can see absolutly everything.