Appearance of Interfaced Lambertian Microfacets, using STD Distribution

M. Ribardière (1, 2) , D. Meneveaux (1, 2) , B. Bringier (1, 2) , Lionel Simonot (3, 2)

1 XLIM-ASALI - Synthèse et analyse d'images
2 UP - Université de Poitiers = University of Poitiers
3 PPrime [Poitiers] - Institut Pprime [UPR 3346]

This paper presents the use of Student’s T-Distribution (STD) with interfaced Lambertian (IL) microfacets. The resulting model increases the range of materials while providing a very accurate adjustment of appearance. STD has been recently proposed as a generalized distribution of microfacets which includes Beckmann and GGX widely used in computer graphics; IL corresponds to a physical representation of a Lambertian substrate covered with a flat Fresnel interface. We illustrate the appearance variations that can be observed, and discuss the advantages of using such a combination.

Mots clés: shadowing; shading; Three-Dimensional Graphics and Realism-Color

Domaines: Synthèse d'image et réalité virtuelle [cs.GR]; Modélisation et simulation

M. Ribardière, D. Meneveaux, B. Bringier, Lionel Simonot. Appearance of Interfaced Lambertian Microfacets, using STD Distribution. Workshop on Material Appearance Modeling, Jun 2017, Helsinki, Finland. ⟨hal-01966359⟩