       SippPolygonPush [-flags] vertexList
              Create  a  polygon from a list of vertices and push
              it onto the polygon stack.  The following flags may
              be specified:

                 o  -tex - Texture coordinates are supplied.  The
                 behavior of texture coordinates depends  on  the
                 shader.

                 o -notex - Texture coordinates are not supplied.
                 This is the default.

                 o -clock - Vertices are in the list in clockwise
                 order  when  looking  at  the  front face of the
                 polygon.

                 o -counter - Vertices are in the list  in  coun-
                 terclockwise  order  when  looking  at the front
                 face of the polygon.  This is the default.

            The vertices must be pushed on the  vertex  stack  in
            either  counterclockwise  (the  default) or clockwise
            order when looking at the "front" face of  the  poly-
            gon.   Otherwise  the  front  of  the surface will be
            defined in the wrong direction.  If  -tex  is  speci-
            fied,  then  the list contains both vertices and tex-
            ture coordinates, each  element  being  in  the  form
            "{x y z} {u v w}".   If  -tex  is not specified, then
            the list contains just vertices, each  element  being
            in the form "{x y z}".

            If  a  vertex  in the polygon is already defined in a
            previous polygon that belongs to  the  same  surface,
            the  same  vertex  will  be referenced, i.e. vertices
            shared between polygons are  only  stored  once,  but
            they must be repeated when defining the polygons.
