       SippCube size shaderhandle [texture]
              Create  a  cube  with the side of length side.  The
              surface is shaded with the  algorithm  and  surface
              parameters  specified by shaderhandle.  The cube is
              centered about the origin. surface is  the  surface
              description  used  by shader() which is the shading
              function used when shading the cube.

              Texture is the texture mapping algorithm to use for
              the object.  The NATURAL texture mapping is similar
              to CYLINDRICAL but the `x' coordinate is not  taken
              from  projection  on  a cylinder but is evenly dis-
              tributed around the perimeter. An odd thing in  all
              the  2D mappings (all except WORLD) for the cube is
              that the top face  will  have  texture  coordinates
              (0.0, 1.0) while the bottom will get (0.0, 0.0).

              See   the   help  file  sipp/Texture-Map  for  more
              details.

              An object handle that references the new object  is
              returned.
