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<p><b>Abstract</b>—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.</p>
Caustics, real-time rendering, image-space techniques, GPU.

S. Pattanaik, M. A. Shah and J. Konttinen, "Caustics Mapping: An Image-Space Technique for Real-Time Caustics," in IEEE Transactions on Visualization & Computer Graphics, vol. 13, no. , pp. 272-280, 2007.
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