HOLZSCHUCH, Nicolas; PACANOWSKI, Romain

doi:10.1145/3072959.3073621

Metadatos

Licencia de uso del documento

HOLZSCHUCH, Nicolas
Models and Algorithms for Visualization and Rendering [MAVERICK ]

PACANOWSKI, Romain
Laboratoire Photonique, Numérique et Nanosciences [LP2N]
Melting the frontiers between Light, Shape and Matter [MANAO]

Idioma

Article de revue

Este ítem está publicado en

ACM Transactions on Graphics. 2017-07-20, vol. 36, n° 4, p. 12

Association for Computing Machinery

Resumen en inglés

Adequate reflectance models are essential for the production of photorealistic images. Microfacet reflectance models predict the appearance of a material at the macroscopic level based on microscopic surface details. They provide a good match with measured reflectance in some cases, but not always. This discrepancy between the behavior predicted by microfacet models and the observed behavior has puzzled researchers for a long time. In this paper, we show that diffraction effects in the micro-geometry provide a plausible explanation. We describe a two-scale reflectance model, separating between geometry details much larger than wavelength and those of size comparable to wavelength. The former model results in the standard Cook-Torrance model. The latter model is responsible for diffraction effects. Diffraction effects at the smaller scale are convolved by the micro-geometry normal distribution. The resulting two-scale model provides a very good approximation to measured reflectances.< Leer menos

Palabras clave en inglés

diffraction

material models

CCS Concepts: Computing methodologies → Reflectance modeling

BRDF

URI

https://oskar-bordeaux.fr/handle/20.500.12278/181868

DOI

http://dx.doi.org/10.1145/3072959.3073621

Proyecto ANR

Reproduction de textures d'objets d'art ancien à base de micro-géométrie - ANR-15-CE38-0005

Orígen

Importado de Hal

Centros de investigación

Laboratoire Photonique, Numérique et Nanosciences (LP2N) - UMR 5298