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Scattering from specular surfaces produces complex optical effects that are frequently encountered in realistic scenes: intricate caustics due to focused reflection, multiple refraction, and high-frequency glints from specular microstructure. Yet, despite their importance and considerable research to this end, sampling of light paths that cause these effects remains a formidable challenge.
Wenzel Alban Jakob, Tizian Lucien Zeltner, Merlin Eléazar Nimier-David, Nicolas Julien Roussel, Ziyi Zhang, Fabrice Rousselle