A new version of the 3D city viewer is online.
I have now implemented the speed optimizations in the viewer and was able to increase the speed by a factor of 1000 for large maps. Now even on my old Android tablet the map is displayed much smoother than I would have expected.
The buildings from the first and second edition are now displayed in different colors (1st=grey, 2nd=red). Furthermore, an untextured terrain model is now loaded and displayed.
hive-tools: http://cryptoriddler.bplaced.net/hivetools/
Hive-tools is a collection of tools for hive and was created by 
You can login to the site with keychain, but most of the functions can currently be used without login.