Latest Photoshop Rendering
what are you trying for? is this just an illustration? a comic book design, a bike design, or?
more background would help the comments flow.
the rendering looks OK, but the background and technique make it look very cartoon-ish.
more detail and accurate proportions would help along with a more realistic shadow and reflection approach.
already posted in another thread, but check this link and samples-
http://www.thegnomonworkshop.com/dvds/sro06.html
R