In this course you will dive into the amazing world of creating fantasy vehicles. Concept artist Brian Lee will walk you through his process of developing a design as he would in a real production environment. You'll start with a few simple sketches and end up with a fully rendered fantasy vehicle concept.
http://design.tutsplus.com/courses/how-to-design-fantasy-vehicles
http://design.tutsplus.com/courses/how-to-design-fantasy-vehicles