Brett Keating, Nelson L. Max. Shadow Penumbras for Complex Objects by Depth-Dependent Filtering of Multi-Layer Depth Images. In Dani Lischinski, Gregory Ward Larson, editors, Rendering Techniques 99, Proceedings of the Eurographics Workshop in Granada, Spain, June 21-23, 1999. pages 197-212, Springer, 1999.
Abstract is missing.