I don't think it's the software installation being wrong because the render is exactly the same in Carrara 3D Basics as it is in Carrara 5 standard.

Posting screen cap....

See what I mean?  Dusty, full of mist.

Measure your mind's height
by the shade it casts.
Robert Browning (Paracelsus)

Fran's Freestuff

http://franontheedge.blogspot.com/

http://www.FranOnTheEdge.com