This may be a treasure trove of information for me. I have been doing SketchUp modeling for over a year now. I have been modeling Native American earthworks in my spare time ( http://earthworkreconstruction.blogspot.com/ ), which has not been much since I'm in grad school. I am out on summer vacation and am trying to catch up. If anyone has any ruby suggestions I am all ears, or eyes as the case may be. I do mostly organic shapes which is not that easy in SketchUp. I am also looking to get better at textures, so I am also looking for suggestions in that category as well.