Volumetric Vector-Based Representation
for Indirect Illumination Caching
Journal of Computer Science and Technology, 25(5):925-932, Sept. 2010
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 others 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.
Caching for global illumination, photon mapping, particle tracing.
title = "Volumetric Vector-Based Representation for Indirect Illumination Caching",
author = "Romain Pacanowski and Xavier Granier and Christophe Schlick and Pierre Poulin",
journal = "Journal of Computer Science and Technology",
year = 2010,
month = sep,
volume = 25,
number = 5,
pages = "925--932"
Adobe PDF version of the paper
(Please visit the journal website or contact the authors for a pre-print).