Article | The Annual SIGRAD Conference. Special Theme - Environmental Visualization | Improved Diffuse Anisotropic Shading

Title:
Improved Diffuse Anisotropic Shading
Author:
Anders Hast: Creative Media Lab, University of G√§vle, Sweden Daniel Wesslén: University of G√§vle, Sweden Stefan Seipel: University of G√§vle, Sweden
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Year:
2004
Conference:
The Annual SIGRAD Conference. Special Theme - Environmental Visualization
Issue:
013
Article no.:
014
Pages:
57-58
No. of pages:
2
Publication type:
Abstract and Fulltext
Published:
2004-11-24
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press; Linköpings universitet


Cloth; hair; brushed metal; and other surfaces with small; regular surface features exhibit anisotropic reflectance properties for which common isotropic shading methods are not suited. Shading of such materials is often implemented by computing the normal giving the maximum light contribution instead of solving the integral that is the sum of all reflected light. In this paper we show that this integral can be simplified if the direction to the viewer and fibre geometry is not taken into account. Still; this will give a more accurate result than the very rough simplification of using the maximum contribution. This computation is simple for diffuse light. However; the specular light still needs some more elaboration to work.

Keywords: Anisotropic shading; diffuse light

The Annual SIGRAD Conference. Special Theme - Environmental Visualization

Author:
Anders Hast, Daniel Wesslén, Stefan Seipel
Title:
Improved Diffuse Anisotropic Shading
References:

D. BANKS 1994. Illumination in Diverse Codimensions. In Proceedings SIGGRAPH; pp. 327‚Äď334.


W. HEIDRICH; H-P. SEIDEL. 1998. Efficient rendering of anisotropic surfaces using computer graphics hardware. In Image and Multi-dimensional Digital Signal Processing Workshop (IMDSP); 1998.


P. POULIN; A. FOURNIER 1990. A model for anisotropic reflection. ACM SIGGRAPH Computer Graphics; Proceedings of the 17th annual conference on Computer graphics and interactive techniques; Volume 24 Issue 4; pp. 273‚Äď282.

The Annual SIGRAD Conference. Special Theme - Environmental Visualization

Author:
Anders Hast, Daniel Wesslén, Stefan Seipel
Title:
Improved Diffuse Anisotropic Shading
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