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JCST
2010

Volumetric Vector-Based Representation for Indirect Illumination Caching

8 years 5 months ago
Volumetric Vector-Based Representation for Indirect Illumination Caching
Abstract This paper introduces a caching technique based on a volumetric representation that captures low-frequency indirect illumination. This structure is intended for efficient storage and manipulation of illumination. It is based on a 3D grid that stores a fixed set of irradiance vectors. During preprocessing, this representation can be built using almost any existing global illumination software. During rendering, the indirect illumination within a voxel is interpolated from its associated irradiance vectors, and is used as additional local light sources. Compared with other techniques, the 3D vector-based representation of our technique offers increased robustness against local geometric variations of a scene. We thus demonstrate that it may be employed as an efficient and high-quality caching data structure for bidirectional rendering techniques such as particle tracing or photon mapping. Keywords Caching for Global Illumination, photon mapping, Particle Tracing. 1 Motivation ...
Romain Pacanowski, Xavier Granier, Christophe Schl
Added 28 Jan 2011
Updated 28 Jan 2011
Type Journal
Year 2010
Where JCST
Authors Romain Pacanowski, Xavier Granier, Christophe Schlick, Pierre Poulin
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