Spiral City - procedural car dirt + set extension

Here is the latest update of Spiral City. In this version you can see the randomization of the traffic signs, the procedural dirtying of the older car types as well as a set extension in the form of some houses that have been added as single objects in addition to the ones produced in esri city engine. furthermore this time a rather flat not so contrasty faded lighting variant has been chosen. Please note the school bus going out of town! LOL :) btw The windows of the peugot 404 must probably be remodeled because they are so low polygonal that they represent the refraction index and the reflection incorrectly.