There may be times when your polygon mesh does not appear as smooth as you would like. Maya provides several methods for smoothing
            polygons:
         
            -  Mesh > Smooth: Maya modifies the polygon mesh by adding new polygons and smoothing out vertices and their connected edges. For more information
               see To smooth by adding polygons below.
            
-  Mesh > Average Vertices: Maya averages the values of the vertices to produce a smoother surface without modifying the topology. Average Vertices
               is useful when you want to maintain the existing polygon count in a mesh. For more information see To smooth by adding vertices below.
            
-  Proxy > Subdiv Proxy: Displays both a smoothed version of the polygon mesh as well as the original unsmoothed version so you can edit and animate
               the mesh more easily. For more information see Preview a smoothed polygonal mesh.
            
-  Mesh > Sculpt Geometry Tool: The  smooths the polygon mesh by letting you manually modify the position of polygon vertices using a brush paradigm. This lets
               you smooth local regions of the mesh and does not modify the topology. For more information see Smooth a surface mesh.
               Tip 
                     If you are using mental ray rendering, you can also smooth polygon meshes at render time using the . See Smooth polygon meshes at render time of the Rendering guide for more information.
                      
 
 To smooth by adding polygons
         
         
            - Select the mesh or just the faces you want to smooth.
- Select Mesh > Smooth.
            
 To smooth by moving vertices
         
         
            - Select the mesh or just the vertices you want to smooth.
- Select Mesh > Average Vertices.
               Note 
                     You can apply this action repeatedly to smooth more and more (use the āgā hotkey to repeat the last action), or you can choose
                        Mesh > Average Vertices >  and set a specific . and set a specific .
 
 
 
            Troubleshooting the  feature
            
 
              Smooth works strangely or not at all? 
            
 
            Smoothing works with convex and even star-shaped concave faces. However, it can give unwanted results with concave faces where
               the center point is not inside the face.
            
  
            To fix a concave faces, use Edit Mesh > Split Polygon Tool or Mesh > Triangulate.