Training 18 : City Spaceship

3 times in a raw, today's inspiration is coming from one friend (Emilien !). The idea of training my drawing is not only drawing subject that I don't usually do, but also the way that I do it.

I usually don't draw in perspective because I'm lazy, and in small sizes. This one, is a A3 3D"ish" floating city.

(Click the image to get the full screen version).

Down below you can see the preparation drawing that I did before jumping onto the A3, in order to get a better understanding of how several things would look like.

Although it was fun, it took me roughly 4 hour from first research sketches to final drawing...