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Thanks to Bill Martin, David Johnson, Brian Smits and the members of the University of Utah Computer Graphics groups for help in the initial stages of the paper, to Richard Coffey for helping to get the paper in its final form, to Bill Thompson for getting us to reexamine our interpretation of why some illustration rules might apply, to Susan Ashurst for the sharing her wealth of artistic knowledge, to Dan Kersten for valuable pointers into the perception literature, and to Jason Herschaft for the dinosaur claw model. This work was originally inspired by the talk by Jane Hurd in the SIGGRAPH 97 panel on medical visualization. This work was supported in part by DARPA (F33615-96-C-5621) and the NSF Science and Technology Center for Computer Graphics and Scientific Visualization (ASC-89-20219). All opinions, findings, conclusions or recommendations expressed in this document are those of the author and do not necessarily reflect the views of the sponsoring agencies.

Bruce or Amy Gooch