@techreport{weko_62833_1, author = "Tetsuya,Kakuta and Takeshi,Oishi and Katsushi,Ikeuchi", title = "Fast Shading and Shadowing and Handling Occlusions for Asuka-Kyo MR Contents", year = "2009", institution = "The University of Tokyo, The University of Tokyo, The University of Tokyo", number = "6", month = "jun" }