To view the HTML version of the Sketch paper, please load the file

	SIG.HTM

into your browser.

This paper was presented at the SIGGRAPH conference with a
15 minute video tape.  If you would like a copy of this tape,
please contact Bob Zeleznik via email (bcz@cs.brown.edu).
Alternatively, you may write to him at

PO Box 1910, Brown University
Providence, RI 02912
USA

Thanks for your interest in this paper.

-The authors
Bob Zeleznik, Ken Herndon and John Hughes