Kyle Hegeman, Simon Premoze, Michael Ashikhmin, George Drettakis. Approximate ambient occlusion for trees. In Marc Olano, Carlo H. Séquin, editors, Proceedings of the 2006 Symposium on Interactive 3D Graphics, SI3D 2006, March 14-17, 2006, Redwood City, California, USA. pages 87-92, ACM, 2006. [doi]
Abstract is missing.