How to Edit Polyface Mesh on AutoCAD

A polyface mesh is edited with the "pedit" command.

AutoCAD offers several ways that you can create 3D objects. One of these is the legacy “polyface” command. Although now considered obsolete as a result of the mesh object type, the polyface option is still available for users who prefer it. Once you have added a polyface to your design, you can make subsequent modifications to it using the “pedit” command.

Instructions

1. • 1
     Open AutoCAD. Open the file containing the polyface mesh you want to edit. Click the mesh to select it, then enter “pedit” into the command line interface. Press “Enter.”
   • 2
     Type “E” and press “Enter” to edit the vertices of the mesh. Press “N” to move to the vertex you want, then press “M” to move it or “R” to regenerate it.
   • 3
     Type “S” then press “Enter” to smooth the surface of the mesh. By default, this changes the mesh to a cubic B-spline surface, but quadratic B-spline and Bezier surfaces are available by changing the “SURFTYPE” system variable to “5” or “6” respectively.
   • 4
     Type “D,” then press “Enter” to desmooth the mesh to its original configuration.
   • 5
     Type “M” and press “Enter” to open or close the M-direction polylines.
   • 6
     Type “N,” then press “Enter” to open or close the N-direction polylines.
   • 7
     Type “U” to undo all changes you have made.