When increased, the specular highlight in the X or Y direction shrinks in size-when decreased, the specular highlight spreads out. Small values correspond to surfaces with fine structure. Large values correspond to surfaces which vary smoothly in the X or Y direction.
For Spread Y, the range is 0.1 to 100.0 and the default is 3.0 The Y direction is perpendicular to the X direction in UV space.įor Spread X, the range is 0.1 to 100.0 and the default is 13. The X direction is the U direction rotated counter-clock-wise by the specified Angle degrees.
You can find this material in the Create tab.ĭetermines how much the grooves spread out in the X and Y directions. You can set attributes of Anisotropic materials to control the appearance of highlights, determine the orientation and spread of grooves, set the roughness and reflectivity, and reduce spherical abnormalities (fresnel index). If you spin an anisotropic sphere, its specular highlight changes, depending on the direction of the grooves. If you spin an isotropic sphere, its specular highlight remains still.Īn anisotropic material reflects specular light differently in different directions. The Specular shading attributes (shiny highlights) determine the direction of the grooves as well as their properties.Īn isotropic material (such as Phong or Blinn) reflects specular light identically in all directions. The appearance of specular highlights on an Anisotropic material depends on the properties of these grooves and their orientation. Is a material (shader) that represents surfaces with grooves, such as a CD, feathers, or fabrics like velvet or satin.