9.5.2

858 • CHAPTER 18
THE SHADERS • 859
Noise is a special type of channel shader that produces 30 types of noise. The shader can calculate the
noise in 2D (Space set to UV 2D) or in 3D space. The advantage of 3D noise is that you don’t have to
worry about mapping or seams in the texture.
Shader Properties
Color 1, Color 2
The colors in the noise will be interpolated between the two colors that you specify here.
Noise
You can choose from 30 types of noise. You’ll nd an example for each type of noise later in this
chapter.
Octaves
Octaves of detail in the noise.
Space
What space to calculate the noise in.
UV (2D)
The noise is projected in 2D.
Texture
The noise is calculated in object space and remains the same regardless of object position or
orientation and takes into account the projection modications of the Texture Tag.
Object
The noise is calculated in object space and remains the same regardless of object position or
orientation, but does not use the attributes of the Texture tag.
World
The noise is calculated in world coordinates and is not affected by the object’s orientation or position.
This allows the object being shaded to move through the noise.