Due to the complexities of the fibers yarn, and fabric structures, modeling fabrics has been a challenging work. Since the yarn and fabrics are three-dimensional objects the surface cannot be regarded as flat. At a certain viewing angle, it is quite evident that there are some occlusion and self-shadowing effects from the three-dimensional nature of the crossing yarns. Based on a simple fabric model, using parallel multi-filaments yarn model, a three-dimensional plain weave fabric model is constructed. The effects of viewing and illumination conditions on the anisotropy of the reflection were also studied.