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Caustics Mapping: An Image-Space Technique for Real-Time Caustics
March/April 2007 (vol. 13 no. 2)
pp. 272-280

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.

Index Terms:
Caustics, real-time rendering, image-space techniques, GPU.
Musawir A. Shah, Jaakko Konttinen, Sumanta Pattanaik, "Caustics Mapping: An Image-Space Technique for Real-Time Caustics," IEEE Transactions on Visualization and Computer Graphics, vol. 13, no. 2, pp. 272-280, March-April 2007, doi:10.1109/TVCG.2007.32
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