9.5.2

892 • CHAPTER 18
THE SHADERS • 893
Anisotrophy page
Active
Disable this option to switch off anisotropic scratches. The enabled option will create a surface that
looks as though it is made up of a huge number of tiny scratches, i.e. a matt surface.
Projection
The type of projection utilized 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. Experimentation is absolutely required to understand these parameters.
Planar
A at XY planar projection.
Auto Planar
Automatically projects on a plane parallel to the current normal.
Shrink Wrap
A spherical projection for scaling direction, but uses a separate algorithm for projecting the
scratches.