View-Dependent Particles for Interactive Non-Photorealistic Rendering
Derek Cornish, Andrea Rowen, David Luebke.
Graphics Interface (GI'01), June,
2001. [BibTeX]
Volume Illustration: Non-Photorealistic Rendering of Volume Models
Penny Rheingans, David Ebert.
IEEE Transactions on Visualization and Computer Graphics, Vol. 7, No. 3, pp. 253--264, July-Sept,
2001. [BibTeX]
Volumes of Expression: Artistic Modelling and Rendering of Volume Datasets
S. M. F. Treavett, Min Chen, R. Satherley, M. W. Jones.
Computer Graphics International (CGI'01), Hong Kong, China, July 03 - 06,
2001. [BibTeX]
Walk-Through Illustrations: Frame-Coherent Pen-and-Ink Style in a Game Engine
Author(s): Bert Freudenberg, Maic Masuch, Thomas Strothotte.
Article: Computer Graphics Forum (EG'01), Vol. 20, No. 3, pp. 184--191,
2001.
[BibTeX] 
Abstract:
In this paper we show how a game engine designed to generate photorealistic images can be extended to produce non-photorealistic and hybrid renditions. We introduce new hardware-based methods to accomplish pen-and-ink illustrations. The combination of the highly optimized processing of a game engine and the use of hardware for NPR algorithms yields real-time animation of pen-and-ink illustrations. The particular advance of this method is that it yields the first real-time, frame-coherent pen-and-ink animations which maintain both tone and texture.