Interactive rendering of optical effects in wet hair

Conférence Chapitre d'actes Interactive rendering of optical effects in wet hair eng 2007 author Gupta Rajeev 134381 author Magnenat Thalmann Nadia 24684 133-140 10.1145/1315184.1315208 978-1-59593-863-3 http://portal.acm.org/citation.cfm?doid=1315184.1315208 Visually, wet hair is easily distinguishable from dry hair because of the increased highlights and intense darkening displayed by them. It is therefore essential for realism to capture these characteristics under certain real world conditions. In this regard we propose a model for rendering wet hair at interactive rates. We start by analyzing the physical aspect behind this special effect in hair and then present a model for incorporating the variations in visual appearance of the hair due to presence of water. For simulating the increased specularity because of the water layer on hair, we present a parameter controlled Gaussian-based model. To simulate darkening in hair, for outer hair we consider total internal reflection at water-hair interface as dominant and propose a probabilistic approach to determine the amount of light absorbed. For inner hair, we consider that increase in opacity due to water results in stronger self-shadow and propose a model that updates the opacities based on water content and accumulates them to calculate the self-shadow term. By preprocessing and optimising our algorithm both for the self-shadow in dry hair and the special effects due to water presence, we can get visually pleasing results at interactive rates. Furthermore, the model is highly versatile and can easily be adaptable to other liquids and hair styling products. Wet Hair Rendering Self-Shadow Hair Simulation Interactive Rendering Dewey 025.063 Dewey 330/650 New York ACM Press 13 Centre universitaire d'informatique 0D3 9 Faculté d'économie et de management S false 899 MIRALab Proceedings of the 2007 ACM symposium on Virtual reality software and technology, VRST '07 Spencer, Stephen N. 5-7 November 2007 Newport Beach (California) 835e50f0-68c0-4259-a4cc-ce9510d22d26 Proceedings chapter (Published version) Public 2007Gupta_interactive_rendering.pdf 11184717 application/pdf openAccess Centres et instituts / Centre universitaire d'informatique Faculté d'économie et de management

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Interactive rendering of optical effects in wet hair	Proceedings of the 2007 ACM symposium on Virtual reality software and technology, VRST '07			2007	344	752

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Gupta, Rajeev