As with the Clockworks image, this was rendered (at the request of a friend) at 7200x7200px. Here in preview form and this time rendered in Blender Internal.
He's also requested a third print to complete the triptych.
I'll let you all know how that goes!
I used the Clockworks mesh to cast some shadow in this render and added the (hopefully subtle?) bird shaped shadow with GIMP post render.