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Participating Media
QuickTime™ and aTIFF (Uncompressed) decompressor
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Ray Marching Result
QuickTime™ and aTIFF (Uncompressed) decompressor
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Media as Probabilistic Entity
QuickTime™ and aTIFF (Uncompressed) decompressor
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Probabilistic Media Example
QuickTime™ and aTIFF (Uncompressed) decompressor
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Probabilistic Media Example 2
QuickTime™ and aTIFF (Uncompressed) decompressor
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Rendering Comparison
QuickTime™ and aTIFF (Uncompressed) decompressor
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QuickTime™ and aTIFF (Uncompressed) decompressor
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Traversal Comparison
QuickTime™ and aTIFF (Uncompressed) decompressor
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Software Impact
• Probabilistic media act like surfaces– Subclass them from Surface
• No volume pass after surface shading
• Separates intersection and shading
Simplify Importance Sampling
• Remove Separation of Direct/Indirect
• Multiple Importance Sampling (MIS)
• Consistent Sampling Domain
Direct vs Indirect
QuickTime™ and aTIFF (Uncompressed) decompressor
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QuickTime™ and aTIFF (Uncompressed) decompressor
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Multiple Importance Sampling
• Impressive variance reduction
• Requires ability to request pdf arbitrarily
• Can lead to high branching
Tagged Objects
QuickTime™ and aTIFF (Uncompressed) decompressor
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QuickTime™ and aTIFF (Uncompressed) decompressor
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Wavelength Dependence
• Photons have individual wavelengths
• Scattering depends on wavelength
• Color Noise
Color Noise
QuickTime™ and aTIFF (Uncompressed) decompressor
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QuickTime™ and aTIFF (Uncompressed) decompressor
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QuickTime™ and aTIFF (Uncompressed) decompressor
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