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13.1.3.2 Specular attributes

 
Specular section of the ifmOpaque material
 
Weight
The amount of specular weight. A value of 0 shows no specular reflection. A value of 1 shows only the specular reflections.
 
Mode
The specular reflection of the material. Select one of the following attribute values:
 
Constant: The specular reflection of the material is angle independent.
 
Curve: The specular reflection of the material is defined by a custom curve, defined by:
Fresnel: The specular reflection of the material is defined by the Fresnel term.
 
Fresnel (Advanced): Same behaviour as Fresnel.
Color
The specular color of the material.
 
Type
This attribute sets the distribution function for the specular light interaction. The default function is named Simple and is the only one used by older versions of ifmOpaque.
For advance uses, such as matching another implemantation, Iray for Maya 2.0 provides the following alternative distribution functions for glossy interactions.
The alternate functions are:
Roughness
The appearance of the specular reflection. A value of 0 describes a plain, smooth and highly reflective surface; a value of 1 describes a rough and dull surface.