I was asked by Georgetown University to produce a banner illustration to show a diversity of people, ethnicities, genders and ages. While waiting for the brief I had started to do some pen drawings of heads and envisaging a way the banner might work. The yellow version here is an option but as it turns out the requirements called for a high level of realism - more of a photo/collage look.
These rough line scamps were intended to show the layout. Larger heads in front, receding in size with rows of people behind.
These were three alternatives of which the all-blue version was the preferred option.