Efficient Importance Sampling Techniques for the Photon Map

  title={Efficient Importance Sampling Techniques for the Photon Map},
  author={Alexander Keller and Ingo Wald},
In global illumination computationsthe photonmapis a powerful tool for approximatingthe irradiance,which is storedindependentfrom scenegeometry. By presenting a new algorithm,which usesnovel importancesampling techniques, we improve thememoryfootprint of thephoton map,simplify the causticgeneration,andallow for a muchfastersamplingof directilluminationin complicated modelsasthey arisein a productionenvironment. 
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