Baoquan Chen Frank Dachille Arie E. Kaufman Footprint Area Sampled Texturing. 230-240 2004 10 IEEE Trans. Vis. Comput. Graph. 2 http://csdl.computer.org/comp/trans/tg/2004/02/v0230abs.htm db/journals/tvcg/tvcg10.html#ChenDK04