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[1] [2] 
SKETCH: An Interface for Sketching 3D Scenes
Author(s): Robert C. Zeleznik, Kenneth P. Herndon, John F. Hughes.
Proceedings: Proceedings of SIGGRAPH '96, August,
1996.
[BibTeX] 
Abstract:
Sketching communicates ideas rapidly through approximate visual images with low overhead (pencil and paper), no need for precision or specialized knowledge, and ease of low-level correction and revision. In contrast, most 3D computer modeling systems are good at generating arbitrary views of precise 3D models and support high-level editing and revision. The SKETCH application described in this paper attempts to combine the advantages of each in order to create an environment for rapidly conceptualizing and editing approximate 3D scenes. To achieve this, SKETCH uses simple non-photorealistic rendering and a purely gestural interface based on simplified line drawings of primitives that allows all operations to be specified within the 3D world.
User-Guided Composition Effects for Art-Based Rendering
Michael A. Kowalski, John F. Hughes, Cynthia Beth Rubin, Jun Ohya.
2001 ACM Symposium on Interactive 3D Graphics,
2001. [BibTeX]
WYSIWYG NPR: Drawing Strokes Directly on 3D Models
Robert D. Kalnins, Lee Markosian, Barbara J. Meier, Michael A. Kowalski, Joseph C. Lee, Philip L. Davidson, Matthew Webb, John F. Hughes, Adam Finkelstein.
ACM Transactions on Graphics, Vol. 21, No. 3, pp. 755--762, July,
2002. [BibTeX]