provides unified graphics support for 2D and 3D polygons, allowing all standard Mathematica
colors and transparency to be used for both faces and edges, as well as interpolated across polygons.
polygon or collection of polygons in 2D or 3D
graphics directives to specify how to draw edges
graphics directives to specify how to draw interiors of faces
vertex colors to interpolate in 2D or 3D
effective vertex normal directions in 3D
general construct supporting polygonal meshes