Realistic Modeling of Porous Materials

GARCÍA BAUZA, CRISTIAN; EISEMANN, ELMAR; BARAVALLE, RODRIGO; SCANDOLO, LEONARDO; DELRIEUX, CLAUDIO; GARCÍA BAUZA, CRISTIAN; BARAVALLE, RODRIGO; DELRIEUX, CLAUDIO; EISEMANN, ELMAR; SCANDOLO, LEONARDO

COMPUTER ANIMATION AND VIRTUAL WORLDS

JOHN WILEY & SONS LTD

Lugar: Londres; Año: 2017 vol. 28

1546-4261

Photorealistic modeling and rendering of materials with complex internal mesostructure poses hard challenges in the Computer Graphics community. Particularly, macroscopic porous materials consist of complex translucent ubstances that exhibit different details and light interaction at several different scales. State of the art techniques for modeling porous materials either manage the material as a surface and set up complex capture procedures, or as a volume, by employing different instances of procedural noise models for its representation.While the surface solution achieves several desired material properties, it still presents drawbacks in practical applications ?high computational costs, complex capture procedures, and poor image variability, among others. Volumetric solutions are more flexible, but the final structure and appearance are difficult to control.To overcome these drawbacks, we propose an algorithm for the procedural generation of porous materials. The method is based on an artistic and physically inspired simulation of the growth of self-avoiding bubbles inside a volume, by means of dynamical systems. The patterns induced by the bubbles can be easily and intuitively controlled. The bubbles adapt to any given shape, and have convincing global and local fluid-like patterns as seen in bread and sponges.Our method generates 3D textures that adequately represent porous materials, whichcan be used as input for creating realistic renderings of different porous objects. As a case study, we present the results of using these 3D textures as input to a direct volume renderer and show that they compare favorably to standard 3D texture synthesis methods.