you can also use the fantastic render engines of Blender: internal or the new Cycles!
Interest : it's free, and it's the polygon modeler the more powerful for make anything!
In constant evolution with thousand developpers around the world!
Of course you must learn it a little ;)
and you can now have the internal render inside the viewport !
Hi Pilou, does Blender still have the problem where it just ignores vertex normals and doesn't actually import them? Until that is fixed it really does not work very well to use Blender to render CAD data.