RegularPolygonSource shows edges

Hello I have a question, I am trying to use RegularPolygonSource to paint in a 3d scene and the edge is shown. I have tried to change the properties of the actor to visibilit edges off o line width to 0 but there is no way to remove the edge of the polygon. Had Someone the same problem? I havr also tried to change the colour of the actor and the edge but no luck.

Thank you