A Few Good Lines: Suggestive Drawing of 3D Models
Mario Costa Sousa, Przemyslaw Prusinkiewicz.
Computer Graphics Forum, Vol. 22, No. 3, pp. 381--390, September,
2003. [BibTeX]
A Few Good Samples: Shape & Tone Depiction for Hermite RBF Implicits
Emilio Vital Brazil, Ives Ma\^cedo, Mario Costa Sousa, Luiz Velho, Luiz Henrique de Figueiredo.
Proceedings of the 8th International Symposium on Non-Photorealistic Animation and Rendering (NPAR'10), pp. 7--15, ACM,
2010. [BibTeX]
Beyond Pixels: Illustration with Vector Graphics
Tobias Isenberg, Angela Brennecke, Mario Costa Sousa, M. Sheelagh T. Carpendale.
Department of Computer Science, University of Calgary, No. Technical Report 2005-804-35, Canada, December,
2005. [BibTeX]
Breaking the Pixel Barrier
Tobias Isenberg, M. Sheelagh T. Carpendale, Mario Costa Sousa.
First Eurographics Workshop on Computational Aesthetics in Graphics, Visualization and Imaging (EGCA'05), pp. 41--48, May 18–20, Eurographics Association,
2005. [BibTeX]
Computer-Generated Graphite Pencil Materials and Rendering
Mario Costa Sousa.
Department of Computing Science, University of Alberta, June,
1999. [BibTeX]
Computer-Generated Pencil Drawing
Author(s): Mario Costa Sousa, John W. Buchanan.
Proceedings: Skiggraph '99,
1999.
[BibTeX] 
Abstract:
In this paper we give an overview of our research on nonphotorealistic
rendering methods for computer-generated pencil
drawing. Our approach to the problem of simulating pencil drawings
was to break it down into the subproblems of (1) simulating
first the drawing materials (graphite pencil and drawing paper,
blenders and kneaded eraser), (2) developing drawing primitives
(individual pencil strokes and mark-making to create tones and textures),
(3) simulating the basic rendering techniques (outlining and
shading of 3D models) used by artists and illustrators familiar with
pencil rendering, and (4) implementing the control of drawing steps
from preparatory sketches to finished rendering results. We demonstrate
the capabilities of our approach with a variety of images generated
from reference images and 3D models.
Depicting Shape Features with Directional Strokes and Spotlighting
Mario Costa Sousa, Faramarz Samavati, Meru Brunn.
Computer Graphics International (CGI'04),
2004. [BibTeX]
Fluid-based hatching for tone mapping in line illustrations
Afonso Paiva, Emilio Vital Brazil, Fabiano Petronetto, Mario Costa Sousa.
The Visual Computer, Vol. 25, No. 5-7, pp. 519--527, May,
2009. [BibTeX]
Illustrating Terrains using Direction of Slope and Lighting
Kevin Buchin, Mario Costa Sousa, Jürgen Döllner, Faramarz Samavati, Maike Walther.
4th ICA Mountain Cartography Workshop, Vall de Núria, Catalunya, Spain, 30th September - 2nd. October 2004,
2004. [BibTeX]
Modeling Plant Structures Using Concept Sketches
Fabricio Anastacio, Mario Costa Sousa, Faramarz Samavati, Joaquim A. Jorge.
NPAR '06: Proceedings of the 4th international symposium on Non-photorealistic animation and rendering, pp. 105--113, New York, NY, USA, June, ACM Press,
2006. [BibTeX]