You really need to get rid of the ambient lighting. You're in a solar system with a planet and a ship between you and the star (close enough). The near side of the ship should be much more shadowed than it is. You might want to place a distant spot light facing the camera way off in the background, with a dark blue fill light much closer, maybe directly beneath the camera, lighting the underside of the ship dimly. A similar light off to the right, above the camera, illuminating the top of the ship (again, dimly) with a slightly different color will help a lot.