Realistic image synthesis requires both complex and realistic models of real-world light sources and efﬁcient rendering algorithms to deal with them. In this paper, we describe a processing pipeline for dealing with complex light sources from acquisition to global illumination rendering. We carefully design optical ﬁlters to guarantee\ud high precision measurements of real-world light sources. We discuss two practically feasible setups that allow us to measure light sources with different characteristics. Finally, we introduce an efﬁcient importance sampling algorithm for our representation that can be used, for example, in conjunction with Photon Maps.\u
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