First I researched various sci-fi ship designs on the internet, consisting of sketches and 3D work. I will take some ideas/inspiration from each of these in my designs.
Following these designs, I did some of my own sketches.
My favourite designs are the first and second one. I will now 3D model it as accurately as possible.
Work in progress screenshots
Added some more components and the second wing.
The final product looks different from the sketch, however I used to design as a base. This is as far as I will model it, now to render it and paintover in photoshop.
Rendering:
The rendered image
And final design in photoshop. I used a metallic texture for the base, then simply added some dodge effects and smudge with slight shading. I also added a logo on the side.
Some improvements I could have made, would be to have made the design less 'primitive' with its shapes in photoshop by drawing more detail on top. However I wanted to keep as much of the 3D model as possible to stick to the realistic lighting and shading. Another improvement would be to perhaps add more textures rather than just one to give it a more realistic feel.