       SippShaderGranite ambient specular c3 scale color1 color2 [opacity]
              This  shader  is  very  similar to marble shader in
              that it also mixes two  colors  using  noise()  and
              turbulence().  The  difference is in how the mixing
              is done. The two colors are mixed without  treating
              them separately in any way.

              ambient is a value between 0.0 and 1.0 which deter-
              mines how much of the base color of a surface  that
              is  visible when it is not illuminated by any light
              source.

              specular is a value between 0.0 and  1.0  which  is
              the fraction of color specularly reflected.

              c3 is the shininess of the surface where 0.0 is the
              most shiny and 1.0 is the most dull.

              scale is a factor which determines the size of  the
              granite  pattern  depending on the size of the tex-
              ture coordinate system in  relation  to  the  world
              coordinate system.

              color1  and  color2  is  a list containing the red,
              green and blue values for the base material.   Each
              being a number between 0.0 and 1.0.

              stripcolor  is a list containing the red, green and
              blue values for the interspersed material.

              opacity describes the opacity  of  a  surface.  0.0
              means   totally   transparent,  1.0  means  totally
              opaque.  May be a list of red, green and blue opac-
              ity  values  or  a  single value to be used for all
              color channels.  Optional, default is 1.0.
