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Interactive Previsualization of Volume Photon Mapping

An interactive graphic application has been developed to previsualize in 3D volume photon maps. The basic tool used has been VTK. The information to visualize comes from a physically-based render engine developed by the authors as well; This render engine uses the global illumination technique calledvolume photon mapping that allows to simulate the light transport in participating media and most of its associated phenomena. The coupling of both the visualization tool and the render engine, makes it possible to previsualize these media even before being rendered, as well as the study, analysis and comprehension of the light behavior in this type of complex environments. Different media have been considered (water, fog, etc.), and the scattering coefficients and the phase function has been analyzed.