Naga K. Govindaraju Michael Henson Ming C. Lin Dinesh Manocha Interactive visibility ordering and transparency computations among geometric primitives in complex environments. 49-56 2005 conf/si3d/2005 SI3D http://doi.acm.org/10.1145/1053427.1053435 db/conf/si3d/si3d2005.html#GovindarajuHLM05