here is my entry. I used an image as example, but the final image is 100% PDN (made with graphic tablet) so it is handdrawn, nothing copy/past past work. First I drew the sketch for the bike, I colored it on an other layer - more layers for shadows/highlights + a lot of gaussianblur.
the Image I used as an example:
EDIT: sorry for the edit, here is a link where you can see the PDN version... Altho I merged some layers down by accident, lol.. have fun looking at it :wink: http://www.vincentvoois.com/aislin/motor.pdn
My final sig: