       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 -norm - User normal vectors are supplied.

                 o  -nonorm  -  User  normal vectors are not sup-
                 plied. This is the default.

                 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 neither -tex or -norm are specified, then the list
            contains just vertices, each  element  being  in  the
            form "x y z".

            If  -norm  is  specified, then the list contains both
            vertices and normal vectors, each  element  being  in
            the form "{x y z} {nx ny nx}".

            If  -tex  is  specified,  then the list contains both
            vertices and texture coordinates, each element  being
            in the form "{x y z} {u v w}".

            If  both  -tex and -norm are specified, then the list
            contains both vertices, normal  vectors  and  texture
            coordinates,   each   element   being   in  the  form
            "{x y z} {nx ny nz} {u v w}".

            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.
