Hi, If the vertices of a polygon are as follows. x = indgen(12) y = [5, 5, 6, 7, 8, 9, 8, 7, 6, 8,5, 4] thisPoly = Obj_New('IDLgrPolygon', x, y, Color=[255,0,255]) thisPoly->SetProperty, STYLE=1 with Style=1 the polygon is created properly as expected.. whereas if Style=2 (i.e when filled), the filling is performed over the outer vertices. And hence these two do not look similar.. Is there any option to make the polygon fill by considering vertices as such and not by outer vertices alone.. Thanks, Subashini