I'm impressed with some of the things you can do with SketchUp... I almost got a ton of graphics programs - most some are poor guy's tools, but I'm not mad at all of 'em - Hexagon 2, Vue 7 (I need to get the full-program), Silo and Blender (I really need to get my feet wet with them).
Enough of the jibber-jabber. Here's one of the buildings I did. I called it The Wiesendock Tower. It took me a good two days to work it out: Design a plan (think about size, circulation, functionality), create elevation, and just design, design away. I like the turn out, though I need some details.
I did the last pic on Kerkythea, the others I did a quick shadowing.
I have made some other towers too. I may share them.
Thanks for looking.