Creating the accessories

Next, I'll add in a couple basic cylinders and cubes at the top to fill in the hull and represent the equipment up there:

Then, I'll do the same for the navigation array at the front:

At the back, I'll add a couple of beveled cubes and cylinders to represent the engine area:

I'll also add some basic shapes in for the grappling gun on the port side:

And the missile launcher on the starboard side:

I'll block out some basic landing gear (skids) on the bottom:

That really wraps up the basic shapes of our ship:

It's a still pretty far from the concept, but you can start to see it taking shape. Now is an excellent time to experiment with the basic layout of the parts. If you want to move things around or make them different, this is a great opportunity.