Rendering Antialiased Shadows with Depth Maps|
Bill Reeves, David Salesin, Robert L. Cook
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]
Available in the Proceedings of SIGGRAPH 1987.