Cool stuff! Great job at pumping these out. Are you doing the grebble by hand or you got the good old grebble script in the background (doesn't look like it though)? How is your mindset towards giving your pieces a sense of scale? In other words, how are you incorporating it in your renders? I'm not feeling the grand scale…
The millenium falcon and the jump gate are cool but a little hard to read in my opinion. The rest of your stuff is awesome. How do you begin to work on designs like this? While creating the initial design do you block out the major shapes? Then do you make a library of cool shaped pieces and then start mashing them…