I've been using SketchUp for some time, but I love that it's coming around in concept art. This is just a number of random examples, some more finished than others. If anyone participates in the SketchUp 3d challenge or uses the YouTube video tutorials, you may recognize some of these models.
The work that Kemp, Whit, Rich, Sam and others do in painting over their models is just awesome, I hope to learn from y'all to do that. As you can see I'm usually not much for texturing.
To give credit, I think one of these models was based on a painting by Feng Zhu, and others take inspiration from all over, but most of these are just something I was interested in at the time.