Software Used?

Does anyone have any idea of what software might have been used for this?

](http://img459.imageshack.us/my.php?image=47thstreetparkrenderbs3.gif)[/IMG]
I need to do something similar but for a row of houses. Don’t want to spend all the time of doing it in Autocad and I need it to have a renderd “artsy” look.

Any help or suggestion would be greatly appreciated.
Thanks