looks like you've got an excellent start there. keep it up and this will be quite a nice model.

one suggestion is to never let your rendering program render to a JPG, they usually give terrible results (as you can see with your overly compressed images). it's better to save them as TGA or PNG and then use something else (like Xat.com's image optimizers) to make a jpg.
if you'd done that intentionally then it's understandable and ignore what i just wrote