Ship Concept Design

This time is for our ship concept design, I done some research about sci-fi ships, but the first thing came out from my head is a star war, so I searched it and got these ship examples, for example like below

And then I did the rough sketch on my paper 

I drew half of them because I can use photoshop to copy another half, it saves time. 

after this sketch I use photoshop drew my ideas from top view which is our main camera view with colored.

on my own opinion the purple ships is for our own whip because the shape is positive traditionally, yellow ships is for enemy boss, because they seems pretty strong and big, these red ships I used negative shape to draw it which is more curve and unknow balls.

love it.