Inkwell: A 2 ½-D animation system
Peter C. Litwinowicz.
SIGGRAPH '91, pp. 113--122,
1991. [BibTeX]
Non-Photorealistic Rendering
Stuart Green, David H. Salesin, Simon Schofield, Aaron Hertzmann, Peter C. Litwinowicz, Amy A. Gooch, Cassidy J. Curtis, Bruce Gooch.
Siggraph 99, ACM Press, Course 17,
1999. [BibTeX]
Processing images and video for an impressionist effect
Peter C. Litwinowicz.
SIGGRAPH '97: Proceedings of the 24th annual conference on Computer graphics and interactive techniques, pp. 407--414, New York, NY, USA, ACM Press/Addison-Wesley Publishing Co.,
1997. [BibTeX]