Su, Y.J.Y.J.SuYUNG-YU CHUANG2018-09-102018-09-102013http://www.scopus.com/inward/record.url?eid=2-s2.0-84879528746&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/379131Gradient-free visualization with multiple light approximations.journal article