       SippShaderBasic ambient specular c3 color [opacity]
              Create a basic shader, which is a modified and sim-
              plified version of Blinn's shading model.

              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.

              color  is a list containing the red, green and blue
              values  for  the  surface.   Each  being  a  number
              between 0.0 and 1.0.

              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.
