Computer Art from Numerical Methods
Mieczyslaw Szyszkowicz.
Computer Graphics Forum, Vol. 10, No. 3, pp. 255--259,
1991. [BibTeX]
Expressive Brush Strokes
Author(s): Binh Pham.
Article: CVGIP: Graphical Models and Image Processing, Vol. 53, No. 1, pp. 1--6, January,
1991.
[BibTeX] [DOI] 
Abstract:
Expressive brush strokes are modeled using a technique based on variable offset approximation of uniform cubic B-splines. The trajectory of a brush stroke is represented as a 3D cubic B-spline and each bristle as a 3D offset cubic B-spline of this trajectory. The first two coordinates are the spatial position coordinates and the third coordinate represents the shade of each bristle. This technique facilitates the process of inputting data, simplifies the computation task, and provides some advantages in the animation process of brush strokes.
Inkwell: A 2 ½-D animation system
Peter C. Litwinowicz.
SIGGRAPH '91, pp. 113--122,
1991. [BibTeX]
Simulating watercolor by modeling diffusion, pigment, and paper fibers
David Small.
SPIE - Image Handling and Reproduction Systems Integration, Walter R. Bender and Wil Plouffe, Vol. 1460, pp. 140--146,
1991. [BibTeX]
Wet and Sticky: A novel model for computer based painting
Tunde Cockshott.
University of Glasgow,
1991. [BibTeX]