It never ceases to amaze me how plain weird Civil War ironclads look. Imagine one of those things steaming straight at your wooden-hulled ship, all smoke and flame and shells...
Here is my model of the ironclad monitor Tecumseh, which was lost in the Battle of Mobile Bay.
There is a build thread over on modelwarships if anyone is interested.
Modelled in Blender by myself. The shot under steam was rendered in Cycles while the turret interior was rendered with Yafaray and the shot at anchor rendered with Octane.
I've added these renders that I forgot to include originally.