9.5.2

946 • CHAPTER 18
THE SHADERS • 947
Low Clip, High Clip
The noise is calculated in a range of 0% - 100%. These values clip that range to provide for bumps
with plateaus (like certain stuccos). Low Clip denes the low boundary for the clip (no bump under
this value). High Clip denes the high boundary for the clip (no bump over this value).
Grit Color, Grit Intensity, Grit Low Clip, Brit High Clip
These controls set the color used as a base to attenuate (multiply by) the specular, diffuse, reection,
environment and ambient results. Negative values invert the grit application. The appropriate range
is -200% - 200%.
Anisotrophy page
Projection
The type of projection is used to dene the anamorphic (disproportional) scaling of the specular
highlights. It can also dene the scratch direction to be used with the reection and environment
convolution groups. The projections are transformed by the Texture tag used to apply them to an
object.
Planar
A at XY planar projection.
Auto Planar
Automatically projects on a plane parallel to the current normal.