SB2 has launched Render[in], areal-time radiosity engine developed for SketchUp Free and Pro users. Now in beta testing, it purportedly gives SketchUp users definition, realistic renderings.
Render[in[ lets users: create a high definition rendering with no size limitation; use existing SketchUp parameters and add new ones; create a photo-realistic project environment (water, sand, grass) and a 3D sky with clouds; create artificial light sources; and see the final result in a real-time radiosity preview window.
Because Render[in] is fully-integrated into SketchUp, it uses the same settings. Once the model is ready, Render[in] offers realistic additions like a 3D sky, four types of clouds, and modifiable lighting sources. Render[in] also offers additional texture settings to choose from, like specular reflection and shininess, and auto-bump for materials.
The beta version is available for download at http://www.renderin.com ; just remember that beta software is unfinished software so use with care.