 Command entry:
Command entry:  
  Application menu
 Application menu 
 Import 

 Select File To Import dialog 

 Files Of Type drop-down list 

 Choose AutoCAD Drawing (*.DWG, *.DXF). 

 Choose a DWG or DXF file. 

 Click Open. 

 AutoCAD DWG/DXF Import Options dialog 

 Spline Rendering panel
            
 The Spline Rendering panel of the Import Options dialog lets you determine how spline objects imported from DWG and DXF files
            are displayed in the viewports and how they're treated by the 3ds Max renderer. 
         
         
            
            Interface
            
            
            
               
               Spline Rendering panel
               
               
               The controls on this panel are identical in name and operation to those found on the Rendering rollout of editable spline and Edit Spline objects. The values of these settings apply to all imported shapes. Once the import is complete, you can change the settings
                  as necessary for each object with the Modify panel controls. 
               
               
               - Enable In Renderer
- 
                     
                        
                        When on, the shape is rendered as a 3D mesh using the Radial or Rectangular parameters set for Renderer. 
                         
 
- Enable In Viewport
- 
                     
                        
                        When on, the shape is displayed in the viewport as a 3D mesh using the Radial or Rectangular parameters set for Renderer.
                           
                         
 
- Use Viewport settings
- 
                     
                        
                        Lets you set different rendering parameters, and displays the mesh generated by the Viewport settings. Available only when
                           Enable in Viewport is turned on. 
                         
 
- Generate Mapping Coords
- 
                     
                        
                        Turn this on to apply mapping coordinates. Default=off. 
                          3ds Max generates the mapping coordinates in the U and V dimensions. The U coordinate wraps once around the spline; the V coordinate
                           is mapped once along its length. Tiling is achieved using the Tiling parameters in the applied material. For more information,
                           see Mapping Coordinates. 
                         
 
-  Real-World Map Size
- 
                     
                        
                        Controls the scaling method used for texture mapped materials that are applied to the object. The scaling values are controlled
                           by the Use Real-World Scale settings found in the applied material's Coordinates rollout. Default=on. 
                         
 
-  Auto Smooth
- 
                     
                        
                        If Auto Smooth is turned on, the spline is automatically smoothed using the threshold specified by the Threshold setting below
                           it. Auto Smooth sets the smoothing based on the angle between spline segments. Any two adjacent segments are put in the same
                           smoothing group if the angle between them is less than the threshold angle. 
                         
 
-  Threshold
- 
                     
                        
                        Specifies the threshold angle for smoothing, in degrees. Any two adjacent spline segments are put in the same smoothing group
                           if the angle between them is less than the threshold angle. 
                         
 
 
- Viewport
- 
                     
                        
                        Choose this to specify Radial or Rectangular parameters for the shape as it will display in the viewport. Available only when
                           Enable in Viewport and Use Viewport Settings are on. 
                         
 
- Renderer
- 
                     
                        
                        Choose this to specify Radial or Rectangular parameters for the shape as it will display when rendered or viewed in the viewport
                           when Enable in Viewport is turned on. 
                         
 
-  Radial
- 
                     
                        
                        Displays the 3D mesh as a cylindrical object. 
                         
 
- Thickness
- 
                     
                        
                        Specifies the diameter of the viewport or rendered spline mesh. Default=1.0. Range=0.0 to 100,000,000.0. 
                         
 
- Sides
- 
                     
                        
                        Sets the number of sides (or facets) for the spline mesh n the viewport or renderer. For example, a value of 4 results in
                           a square cross section. 
                         
 
- Angle
- 
                     
                        
                        Adjusts the rotational position of the cross-section in the viewport or renderer. For example, if the spline mesh has a square
                           cross section you can use Angle to position a "flat" side down. 
                         
 
-  Rectangular
- 
                     
                        
                        Displays the spline's mesh shape as a rectangle. 
                         
 
-  Length
- 
                     
                        
                        Specifies the size of the cross–section along the local Y axis. 
                         
 
-  Width
- 
                     
                        
                        Specifies the size of the cross–section along the local X axis. 
                         
 
- Angle
- 
                     
                        
                        Adjusts the rotational position of the cross-section in the viewport or renderer. For example, if you have a square cross-section
                           you can use Angle to position a "flat" side down. 
                         
 
-  Aspect
- 
                     
                        
                        Sets the aspect ratio for rectangular cross-sections. The Lock check box lets you lock the aspect ratio. When Lock is turned
                           on, Width is locked to Length that results in a constant ratio of Width to Length.