Yesterday I uploaded a new video - this one shows three Escher tilings you can create in SketchUp. The first one, based on a rectangle is very easy. The second uses a square, just a little harder. The third uses a triangle and is the most complicated, though all three can be done using just a few basic SketchUp tools.
I got some of the ideas from Jill Britton's very nice website on Escher in the Classroom.
The coolest thing about these is how creative you can get. Some of the shapes can become lizards or birds or fish, or whatever comes to mind. If you have a steady hand, you can create nice details using the Freehand tool.
Enjoy! And if you have some neat Escher tilings to share, please let me know!
Anyone can design anything in 3D! http://www.3dvinci.net/