weeb...
And I didn't mean getting rid of the glowing blue protrusions. Perhaps what you could do with the Bismarck superstructure, find a 3d image of the Bismarck (such as in Empire Earth, though I think that it will be tiny when compared to your image) and take the superstructure from there. On the other hand, EE isn't such a good idea, as you have no details... Try to find another Bismarck pic then. Use the exact superstructure, modify it to adjust it to the color/texture of the rest of the ship, and then place the GFG in place of the chimney.