Google
SketchUp is software that you can use to build virtual 3-D models of
anything you like. It's free, available in a number of different
languages, and relatively easy to learn. You can download Google
SketchUp and start using it right away.
The
shelter models you submit for this competition** need to be uploaded from
Google SketchUp (where you can create them) to the Google 3D Warehouse.
This is a huge, online repository of SketchUp models contributed by
people all over the world.
**Please note: submission period is now closed.