Polyface meshes were the first 3D objects in AutoCAD. These meshes are based on 3D faces defined by three or four vertices. Only the
3DFACE command is important, as introduced and used in Chapter 5, 3D Primitives and Conversions. Polyface meshes still have one advantage related to other surfaces and meshes: vertices can be stretched easily.
MESHTYPE variable has value
EDGESURF commands, which were presented before, create polyface meshes. The result of exploding polyface meshes are 3D faces.
These commands have no Undo option. An error in specifying a vertex requires command cancelation or posterior modification.