除了织物的使用环境及光照条件等外部因素外，织物特有的花纹、织纹、褶皱、悬垂、光泽等是影响织物效果模拟图是否逼真的重要因素。
It is believed that the fabric texture, drape, luster and wrinkle, the environment as well as the lighting condition are the major factors which affect the fabric appearance.
由于其计算复杂度远远超过了局部光照计算，传统上全局光照明模拟难以同时获得实时的绘制效率和逼真的效果。
As its calculation complexity is far more than that of local illumination, there has been yet few satisfying solution which achieves high quality and performance simultaneously.
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