DO sketches act as substitutes for mental impressions?

Waldorf Astoria Hotel, Thirty-Fourth Street an...

Waldorf Astoria Hotel, Thirty-Fourth Street and Fifth Avenue (original location). 1 drawing on brown paper : colored crayons over pencil sketch ; sheet 29.3 x 23.1 cm. (Photo credit: Wikipedia)

At one point, placing apartments in Sather Tow...

• The medium (pencil, clay, charcoal, computer, etc.) is not as important in defining a sketch, as its relative function in the design process. Many architects use charcoal or soft pencils to emphasize line, and make the drawing expressive yet vague enough to allow for allusions and analogies. Some architects employ inexpensive tracing paper to sketch quickly, still others draw preliminary studies slowly on expensive paper. Some diagram in the fashion of the parti and others carefully redraw a known building to deform or transform its image.
• The varied media and techniques used to sketch may complicate a definition of these images.
• It is more important to consider their use as conveyors of likeness.
• As representations, sketches act as substitutes for mental impressions. This is important to
architectural sketching as a creative endeavor, because not knowing how mental impressions originated leads creative people to proclaim that such impressions came from the imagination.
• Imagination represents objects that are absent from view, can be used to change or interpret that which has been observed, or can recognize and reuse items which are known(Warnock, 1976).
• The implication for architects when conceptualizing a potential design
• becomes evident. Creative inspiration may be credited to an expanded associative capacity of certain individuals, or it may be attributed to magic or divine intervention. Whatever the case, the imagination encourages speculation because the images in the mind and on paper can assume any possibility (Casey, 1976).