Logs made out of wood. Well, not really made out of wood, since they are Blender meshes that are textured. They are, however, log-shaped, and appear to be logs when looked at from a certain angle.
Please note that you do not have to attribute me if a) it is inconvenient or b) you can't be bothered.
I merely use CC-BY in order to reserve the right to assert my name as the creator of this splendiferous artwork.