9.5.2

948 • CHAPTER 18
THE SHADERS • 949
Attenuation
Scales the amount of detail of the scratches based upon the samples, angle to the camera and the
distance from the camera. The larger the values, the greater the attenuation, causing less scratching
(better for animation); the smaller the value, the greater the detail (better for still images). The
appropriate range is 0% - 10,000%.
Specular 1, Specular 2, Specular 3
These check boxes specify which specular channels will be effected by the anisotropic scratches.
Esotherica Page (Banji and Cheen only)
Global Shadow Opacity
This parameter is used to scale the shadow opacity. Keep in mind that this changes the shadow opacity
for every surface intercepted by the ray, meaning that going through the surface twice causes the
shadow to be twice as dark.
Illumination page
These parameters will only be available if the Advanced Render module is installed. They control the
global illumination effect for the material and have the same function as the settings of the same name
that are described in the Advanced Render manual (Global Illumination chapter).
Assignment page
On the Assignment page, you’ll nd a list of all objects in the scene that use the material. For more
details on this page, look up ‘Assignment tab’ in the index.