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Journal Articles ACM Transactions on Graphics Year : 2013

Linear Efficient Antialiased Displacement and Reflectance Mapping

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Abstract

We present Linear Efficient Antialiased Displacement and Reflectance (LEADR) mapping, a reflectance filtering technique for displacement mapped surfaces. Similarly to LEAN mapping, it employs two mipmapped texture maps, which store the first two moments of the displacement gradients. During rendering, the projection of this data over a pixel is used to compute a noncentered anisotropic Beckmann distribution using only simple, linear filtering operations. The distribution is then injected in a new, physically based, rough surface microfacet BRDF model, that includes masking and shadowing effects for both diffuse and specular reflection under directional, point, and environment lighting. Furthermore, our method is compatible with animation and deformation, making it extremely general and flexible. Combined with an adaptive meshing scheme, LEADR mapping provides the very first seamless and hardware-accelerated multi-resolution representation for surfaces. In order to demonstrate its effectiveness, we render highly detailed production models in real time on a commodity GPU, with quality matching supersampled ground-truth images.
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Dates and versions

hal-00858220 , version 1 (05-09-2013)
hal-00858220 , version 2 (09-09-2013)
hal-00858220 , version 3 (24-01-2014)
hal-00858220 , version 4 (31-03-2014)

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Jonathan Dupuy, Eric Heitz, Jean-Claude Iehl, Pierre Poulin, Fabrice Neyret, et al.. Linear Efficient Antialiased Displacement and Reflectance Mapping. ACM Transactions on Graphics, 2013, Proceedings of Siggraph Asia 2013, 32 (6), pp.Article No. 211. ⟨10.1145/2508363.2508422⟩. ⟨hal-00858220v4⟩
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