Worth checking out, a City Generator plug-in (procedural model generator) which can be used with Cinema4D.

You can also download the Siggraph paper on Ray Traced Factorisation (RTF), interesting bedtime reading on how they did it.
Also, a short video on the theory of RTF, html help file and the plug-in zip file can be found in tutorial folder 48.
Select one of the .xml files (from the unzipped plug-in folder) via the construction file path button, choose one of the model collapse modes, keep/ loose roads, click generate. Open C4D, choose merge and select a .wrl file in the CityGen folder. Voila!
# Tracked down with the help of an ex-student, Antonio who is off to Bournemouth Uni. this September to study the MA Computer Animation.
mark
21/05/2007
a word of warning though – this will only work with the ppc version of c4d
otherwise it is really excellent
felix
10/09/2010
is there any developement on mac yet?
the link isnĀ“t working anymore aswell…
thnx & cheers
fx