Shaders are used by artists and designers to give shading and lighting effect to 3D models they design. Shader is in fact a complex program developed by Microsoft to allow designers to give shine effect to objects. This language is heavily used by artists in 3D modeling and in animation. These shaders are also used to give special effects to objects or models. Pixel shaders are special kind of shaders that create ambience with surfaces made by artists to mimic reality. These shaders give dimples to golf balls and artists even give facial hair to characters using these shaders. Download pixel shader 2.0 for Windows XP here.