Lighting
Lighting features of Iray Interactive render mode include:
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Ray-traced, accurate hard- and soft-shadows
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Accurate reflections and refractions
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Efficient direct light sampling, including light profiles
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Efficient multi-scale environment sampling. Initial coarse-scale approximation with low noise level converges quickly over time to an accurate result
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Approximated indirect lighting (diffuse and glossy but diffuse-only on primary hit).
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Fast, smooth approximation of matte ground shadows
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Two ambient-occlusion modes (diffuse AO, AO guided by environment)
 


