Just came across a new render you may all wish to know about!.
It’s called NOX!.
Have only played around with it for a little while but it looks to have some very interesting features in it as well as being fast!.
It is still in Beta stage but is free and looks great!.
It also comes with the Blender 2.58 exporter also!.
You can Find Nox here!.. http://www.evermotion.org/main
Hope you like and please, if you have problems with the exporter e.t.c, i will see if i can help, took me a little while to work out but is easy enough!..