This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.1)


is an option for Polygon and GraphicsComplex which specifies the normal directions to assign to vertices of 3D polygons.
  • VertexNormals->{n1, n2, ...} specifies that vertex i of a polygon should have effective normal ni for purposes of shading by simulated lighting.
  • The ni are vectors of the form {vx, vy, vz}. Only the directions of these vectors ever matter; the vectors are in effect automatically normalized to unit length.
New in 6