Fort Stick by EricOfPivot, Fort Stick.nodes (4163) - Fort Stick is impenetrable.

Cloud by thane, Cloud.nodes (1786) - A nice cloud. As seen in <a href="http://animationalpha.com/animation/after-the-ambush/">thane's animation here</a>.

Buildings by PartyMaster86, Buildings.nodes (2960) - Good background scenery of a cityscape.