At first sight, it may seem like a black and white sketch, but it's actually made out of nails. A very delicate piece of art.

Starting from one end of the campus, Marcus Levine hammers the nails, free-hand. Once you nail it, there's no adjustments.

It's interesting how the pictures expression changes by the light.

＜Marcus Levine＞http://www.levine-art.co.uk/

http://www.designboom.com/weblog/cat/10/view/13982/marcus-levine-hammer-nail-works.html