Eurographics 2011 LLHNDLJDNO LK Background Bidirectional reflectance distribution function f(c;,o):4D Matusik et al. a Data-Driven Reflectance Model. siggrAPH 2003Background • Bidirectional Reflectance Distribution Function – : 4D Matusik et al. A Data-Driven Reflectance Model. SIGGRAPH 2003