>There is only one free without limitation for sketchup : Kerkythea but not for beginner!
>http://www.kerkythea.net/cms/

He could also use the free ver. of Maxwell Render for SketchUp! :-)

And if he's on the Mac he could use instead of SketchUp Cheetah 3D or
Shade 3D Basic (also available for Win).

Regards
Stefan