EGGH06: SIGGRAPH/Eurographics Workshop on Graphics Hardware 2006
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Browsing EGGH06: SIGGRAPH/Eurographics Workshop on Graphics Hardware 2006 by Subject "Categories and Subject Descriptors (according to ACM CCS): I.3.3 [Computer Graphics]: Line and Curve Generation"
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Item Realistic Soft Shadows by Penumbra-Wedges Blending(The Eurographics Association, 2006) Forest, Vincent; Barthe, Loïc; Paulin, Mathias; Marc Olano and Philipp SlusallekRecent real-time shadow generation techniques try to provide shadows with realistic penumbrae. However, most techniques are whether non-physically based or too simplified to produce convicing results. The penumbra-wedges algorithm is a physical approach based on the assumption that penumbrae are non-overlapping. In this paper, we propose an algorithm that takes the advantages of the penumbra-wedges method but solves the "non-overlapping" limitation. We first compute the light occlusion regions per fragment. Then we use this information to detect the areas where penumbrae are overlapping and we perform a realistic penumbra blending.