Well I'm disappointed.... theres simple just not enough detail in there 
Looks great! Though, I can imagine that your computer gets slow when you smooth all the parts down for rendering. I would recommend using the Approximation editor to smooth the Geo during Rendering.
Great work! Keep it up!
www.stevenegan-cgi.com
"Your weapons are no match for ours! People of Mars, surrender!"
"Um, this isn't Mars. This is Earth."
"Earth? Earth-with-nuclear-weapons Earth?"
"Yes."
[long pause] "Friend!!"