Photon Splatting Using a View-Sample Cluster Hierarchy

Pierre Moreau, Erik Sintorn, Viktor Kämpe, Ulf Assarsson & Michael Doggett
Splatting photons onto primary view samples, rather than gathering from a photon acceleration structure, can be a more efficient approach to evaluating the photon-density estimate in interactive applications, where the number of photons is often low compared to the number of view samples. Most photon splatting approaches struggle with large photon radii or high resolutions due to overdraw and insufficient culling. In this paper, we show how dynamic real-time diffuse interreflection can be achieved by...
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