concept SKETCH - When I was in college one of our projects was 'Design an ecologically sustainable city'. What we came up with looked a bit like this :).
Blue Watch sketches by Thomas Funder
Black and white spiral stair case
by Sergiu Radu Popvia
Commendable line weight usage
Emphasis- This image shows emphasis by the way it gets larger. It emphasizes to me how when you scream it echos. From the middle of the image it starts off small then gradually gets larger.
lines on a surface... | Flickr - Photo Sharing!
Design Sketchbook II on Behance