9.5.2

934 • CHAPTER 18
THE SHADERS • 935
Variance Scale
The scale of the variance function.
Variance Contrast
Contrast applied to the variance noise.
Nukei
Nukei was conceived to allow users the ability to create surfaces that include rusted and weathered
materials that generally have two distinct surfaces with different attributes.
Nukei differs from the other shaders in that it has a Fusing channel that enables two surfaces to be
combined in almost any way via a texture. In addition, Nukei has an Alpha channel. The other material
channels are described later in this chapter. Also, all parameters can be dened separately for Surface
1 and Surface 2 except for Fusing, Illumination and Assignment.