.
Art-Based Rendering of Fur, Grass, and Trees
Michael A. Kowalski, Lee Markosian, J.D. Northrup, Lubomir D. Bourdev, Ronen Barzel, Loring S. Holden, John F. Hughes.
Proceedings of Siggraph 99,
1999. [BibTeX]
Art-based Rendering with Continuous Levels of Detail
Lee Markosian, Barbara J. Meier, Michael A. Kowalski, Loring S. Holden, J.D. Northrup, John F. Hughes.
1st International Symposium on Non-Photorealistic Animation and Rendering (NPAR'00), pp. 59--66, Annecy, France, June 05 - 07,
2000. [BibTeX]
Real-Time Nonphotorealistic Rendering
Lee Markosian, Michael A. Kowalski, Samuel J. Trychin, Lubomir D. Bourdev, Daniel Goldstein, John F. Hughes.
ACM Siggraph 97, Annual Conference Series 1997, pp. 415--420, August,
1997. [BibTeX]
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
Author(s): Robert D. Kalnins, Lee Markosian, Barbara J. Meier, Michael A. Kowalski, Joseph C. Lee, Philip L. Davidson, Matthew Webb, John F. Hughes, Adam Finkelstein.
Article: ACM Transactions on Graphics, Vol. 21, No. 3, pp. 755--762, July,
2002.
[BibTeX] [DOI] 
Abstract:
We present a system that lets a designer directly annotate a 3D model with strokes, imparting a personal aesthetic to the non-photorealistic rendering of the object. The artist chooses a "brush" style, then draws strokes over the model from one or more viewpoints. When the system renders the scene from any new viewpoint, it adapts the number and placement of the strokes appropriately to maintain the original look.