Hi Paloth,
i was following your project, good stuff. I dont know if your Tenochtitlan was one-off project or you are really into archeological visualization, but anyways..i found this neat little software called CityEngine, check it out, it works with GIS layers so you can recreate real cities etc, or you can produce vast purely fictious urban landscapes...quite complex stuff really.

http://www.procedural.com/showcase/industries/archeology.html

Have fun

Ailig