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Rendering optimal solar shadows with plural sunlight depth buffers

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We propose a novel method, based on the two-pass Z-buffer algorithm, to calculate shadows with sufficient precision and efficiency for rendering a daytime landscape with solar penumbrae. The special feature of the proposed method is that the shadows can be preserved with a precision superior to that of any visible surface. We use the optimal number of plural shadow buffers to do this; it gives a fairly satisfying trade–off between computation time and quality of shadows.

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Authors and Affiliations

  1. Department of Perceptual Sciences and Design Engineering, Faculty of Engineering, Yamaguchi University, 2-16-1 Tokiwa-Dai, Ube, 755-8611, Japan, , , , , , JP

    Katsumi Tadamura

  2. Sanei Co., Ltd., Technoplaza Room 402, 3-13-26 Kagamiyama, Higashi-Hiroshima, 739-0046, Japan e-mail: nakamae@sanei.co.jp, , , , , , JP

    Xueying Qin, Guofang Jiao & Eihachiro Nakamae

Authors
  1. Katsumi Tadamura
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  2. Xueying Qin
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  3. Guofang Jiao
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  4. Eihachiro Nakamae
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Tadamura, K., Qin, X., Jiao, G. et al. Rendering optimal solar shadows with plural sunlight depth buffers. Visual Comp 17, 76–90 (2001). https://doi.org/10.1007/PL00013400

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  • DOI: https://doi.org/10.1007/PL00013400

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