Abstract:
This paper presents a real-time global illumination method for
quasi-static scenes illuminated by arbitrary, dynamic light
sources. In order to maintain real-time frame-rates, the light
transport problem is decomposed to low-frequency and
high-frequency parts. The part that has low-frequency
characteristics both in the temporal and in the spatial domains is
pre-computed. Due to the low-frequency properties this solution
can be compressed by clustered PCA without significant reduction
of the accuracy. The spatial high-frequency but temporal
low-frequency parts are pre-computed on small-scale using a modified
ambient occlusion/obscurances method. The temporally
high-frequency components are obtained on the fly. This way we can
combine the advantages of pre-computation aided methods and
real-time rendering.