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  • Title: Caustics mapping: an image-space technique for real-time caustics.
    Author: Shah MA, Konttinen J, Pattanaik S.
    Journal: IEEE Trans Vis Comput Graph; 2007; 13(2):272-80. PubMed ID: 17218744.
    Abstract:
    In this paper, we present a simple and practical technique for real-time rendering of caustics from reflective and refractive objects. Our algorithm, conceptually similar to shadow mapping, consists of two main parts: creation of a caustic map texture, and utilization of the map to render caustics onto nonshiny surfaces. Our approach avoids performing any expensive geometric tests, such as ray-object intersection, and involves no precomputation; both of which are common features in previous work. The algorithm is well suited for the standard rasterization pipeline and runs entirely on the graphics hardware.
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