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Physically inspired technique for modeling wet absorbent materials

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Abstract

The visual appearance of materials depends on their intrinsic light transfer properties, the illumination and camera conditions, and other environmental factors. This is in particular the case of porous, rough, or absorbent materials, where the presence of liquid on the surface alters significantly their BRDF, which in turn results in considerable changes in their visual appearance. For this reason, rendering materials change their appearance when wet continues to be a relevant topic in computer graphics. This is especially true when real-time photo-realistic rendering is required in scenes involving this kind of materials in interaction with water or other liquids. In this paper, we introduce a physically inspired technique to model and render appearance changes of absorbent materials when their surface is wet. First, we develop a new method to solve the interaction between the liquid and the object surface using its own underlying texture coordinates. Then, we propose an algorithm to model the diffusion phenomenon that occurs in the interface between a solid porous object and a liquid. Finally, we extend a model that explains the change of appearance of materials under wet conditions, and we implement it achieving real-time performance. The complete model is developed using GPU acceleration.

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Acknowledgements

JB was partially supported by a scholarship of the National Science and Technology Council of Argentina (CONICET). The research was partially funded by grant 24/K061 of the Universidad Nacional del Sur (Argentina). CD is supported by the Electric and Computing Dept. of the Universidad Nacional del Sur and the National Science and Technology Council of Argentina (CONICET). GP was partially funded by the TIN2017-88515-C2-2-R project from Ministerio de Ciencia, Innovación y Universidades, Spain.

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Authors and Affiliations

  1. Department of Electric and Computer Engineering, Universidad Nacional del Sur, Bahía Blanca, Argentina

    Juan Miguel Bajo & Claudio Delrieux

  2. Department of Computer Science and Engineering, Universidad Nacional del Sur, Bahía Blanca, Argentina

    Juan Miguel Bajo

  3. ViRVIG-UdG, Girona, Spain

    Gustavo Patow

  4. LCI-CONICET, Bahía Blanca, Argentina

    Claudio Delrieux

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  1. Juan Miguel Bajo
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Correspondence to Juan Miguel Bajo.

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Bajo, J.M., Delrieux, C. & Patow, G. Physically inspired technique for modeling wet absorbent materials. Vis Comput 37, 2053–2068 (2021). https://doi.org/10.1007/s00371-020-01963-w

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