Concept sketches are used to convey  ideas & experiences as opposed to formal  presentation drawings prepared from architectural plans.  I try to produce them as quickly as possible from thumbnail sketches so design & marketing clients can present them as story-boards in the early stages of their projects to communicate creativity in events planning, master plans, exhibit design, interiors, etc.  
 

Image at right: Dining Experience, detail; St. Louis Science Center  
Illustrator: Michael Anderson  
Architects: PGAV  

"The first step in developing a three-dimensional   
world is to see it in two-dimensional story-boards,"   
Walt Disney Imagineering                                                 

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Pen & Ink, Marker Illustrations: Michael Anderson, 2003   

Dinosaur Hall, Ecology & Environment Gallery, Paleo Lab   
Exhibit Design: Lyner Productions   

Lobby, Elevator, Dining, Ticketing   
Exhibit design, architecture: PGAV, St. Louis, MO   

Discovery Room, Concourse Alpha, Star Shuttle Boarding Concepts: St. Louis Science Center

Historians trace the evolution  
of storyboards to the Walt Disney Studio. There, in the early 1930's, studio artists would use rough sketches pinned onto bulletin boards to structure their storylines   
and establish a visual framework for each production.  

-The Making of Jurassic Park, Don Shay & Jody Duncan