Xiaoru Yuan Minh X. Nguyen Nan Zhang 0011 Baoquan Chen Stippling and Silhouettes Rendering in Geometry-Image Space. 193-200 2005 conf/rt/2005 Rendering Techniques http://www.eg.org/EG/DL/WS/EGWR/EGSR05/193-200.pdf db/conf/rt/rt2005.html#YuanNZC05