Concept Sketch 2006-03-15a - Traditional media (mostly pencil work over grey marker layout).
Concept Sketch 2006-03-14a - Sketchbook page, showing an un-edited collection of rough sketches.
Lower left sketch was the basis for the illustration on the previous slide.
Concept Sketch 2006-03-13a - Traditional media (mostly pencil work over grey marker layout).
Concept Sketch 2006-03-10a
Sinkhole Towers - Traditional media (mostly pencil work over grey marker layout).
Environmental Design - Traditional media (mostly pencil work over grey marker layout).
Concept Sketch 2006-03-10c_Synthesis3 - Traditional media (mostly pencil work over grey marker layout). This sketch is a digital composite of two separate sketches (left & right).
See next slide for original images.
Concept Sketch 2004-01-13a - Traditional media (mostly pencil work over grey marker layout).
Environmental Design - Older sketch, dating from about 2000. Traditional media, pen & colored pencil.