J. Nimeroff et al., IMPLEMENTATION AND ANALYSIS OF AN IMAGE-BASED GLOBAL ILLUMINATION FRAMEWORK FOR ANIMATED ENVIRONMENTS, IEEE transactions on visualization and computer graphics, 2(4), 1996, pp. 283-298
We describe a new framework for efficiently computing and storing glob
al illumination effects for complex, animated environments. The new fr
amework allows the rapid generation of sequences representing any arbi
trary path in a ''view space'' within an environment in which both the
viewer and objects move. The global illumination is stored as time se
quences of range-images at base locations that span the view space. We
present algorithms for determining locations for these base images, a
nd the time steps required to adequately capture the effects of object
motion. We also present algorithms for computing the global illuminat
ion in the base images that exploit spatial and temporal coherence by
considering direct and indirect illumination separately. We discuss an
initial implementation using the new framework. Results and analysis
of our implementation demonstrate the effectiveness of the individual
phases of the approach; we conclude with an application of the complet
e framework to a complex environment that includes object motion.