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Rendering Antialiased Shadows with Depth Maps William T. Reeves, David H. Salesin, Robert L. Cook July 1987 We present a solution to the aliasing problem for shadow algorithms that use depth maps. The solution is based on a new filtering technique called percentage closer filtering. In addition to antialiasing, the improved algorithm provides soft shadow boundaries that resemble penumbrae. We describe ... more Paper (PDF) Available in the Proceedings of SIGGRAPH 1987. |