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Volume 19 Issue 5
September  2004
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Xue-Ying Qin, Eihachiro Nakamae, Wei Hua, Yasuo Nagai, Qun-Sheng Peng. Anti-Aliased Rendering of Water Surface[J]. Journal of Computer Science and Technology, 2004, 19(5).
Citation: Xue-Ying Qin, Eihachiro Nakamae, Wei Hua, Yasuo Nagai, Qun-Sheng Peng. Anti-Aliased Rendering of Water Surface[J]. Journal of Computer Science and Technology, 2004, 19(5).
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Anti-Aliased Rendering of Water Surface

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  • Published Date: September 14, 2004
    Abstract
  • Water surface is one of the most important components of landscape scenes. When rendering spacious water surface such as that of the lakes and reservoirs, aliasing and/or moire artifacts frequently occur in the regions far from the viewpoint. This is because water surface consists of stochastic water waves which are usually modeled by periodic bump mapping. The incident rays on the water surface are actually scattered by the bumped waves, and the reflected rays at each sample point are distributed in a solid angle. To get rid of the artifacts of moire pattern, we estimate this solid angle of reflected rays and trace these rays. An image-based accelerating method is adopted so that the contribution of each reflected ray can be quickly obtained without elaborate intersection calculation. We also demonstrate anti-aliased shadows of sunlight and skylight on the water surface. Both the rendered images and animations show excellent effects on the water surface of a reservoir.
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