unit 121- Practice

I had a play with lightwave yesterday evening and created a basic Rank 2 ship (out of my story).
I had trouble with the divisions because lightwave wouldn't put them where i wanted them.
I also had trouble with extruding because every odd part went transparent, i need to find a solution for this. I used the double shield option, but i don't like the result.
I put some basic texture on to see what it looks like, but so far i don't like it and as i can't find the render option i can't have a proper look.