Anis
I still mainly use Carrara6Pro for my major 3D work. (other than, now, MoI for modelling)

Over the few years I have saved HUGE amounts of stuff, both my own, and otherwise free for downloading.
This has all, mainly, been added to my Carrara Browser from whence I can drag items into a scene as the inspiration grabs me.

In this instance I used a couple of Dystopia Building sets for the background.
The trees were done in Carrara itself.

Brian