Photon Mapping (Helper Slides) Sampling Patterns Specular - - PowerPoint PPT Presentation

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Photon Mapping (Helper Slides) Sampling Patterns Specular - - PowerPoint PPT Presentation

Sep 23, 2022 375 likes •527 views

Photon Mapping (Helper Slides) Sampling Patterns Specular Reflection and Transmission Available in ray tracer Use Fresnels Eqns for F r Russian Roulette RGB Roulette Caustics: Projection Maps Cast caustic map photons toward

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SLIDE 1

Photon Mapping (Helper Slides)

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SLIDE 2

Sampling Patterns

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Specular Reflection and Transmission

Available in ray tracer Use Fresnel’s Eqns for Fr

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SLIDE 4
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Russian Roulette

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RGB Roulette

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Caustics: Projection Maps

  • Cast caustic map photons

toward specular objects

  • Use object bounds and

rejection testing

  • Simple case: spheres

Jensen & Christensen, 1995

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Photon Mapping Summary

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Solving the Rendering Equation

  • Must compute reflected radiance, Lr
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Solving the Rendering Equation

  • Split BRDF into diffuse and specular parts:
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Solving the Rendering Equation

  • Split incoming radiance into three parts:
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Solving the Rendering Equation

  • Splittings produce four illumination components:
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The Four Illumination Components

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