This image was created with 3DSMax (for the basic blocking out, lighting and rendering), ZBrush (for the detailing on the asteroids and ship textures) and Photoshop (for the final composite) .

Now that I've seen how I approach this subject matter I'm keen to work on more images with whole fleets of fighter craft, capital ships, dreadnoughts and explosions. That would be cool!
Trivia: Angry Robot/ HarperCollins Supremo Marc Gascoigne once pointed out that the ship design isn't as interesting as it could be - it doesn't really draw you in and, with hindsight, he's absolutely right! - I'll add more interest and intrigue on any spacecraft next time.