About Extruding Edges

This sub-topic gives additional information about the propagation of edges to fill a surface.

• The number of edges defined for the fill must be lower than 30. If there are more than 30 edges, fill a few faces individually and multi-select edges to compute the fill at one time.
• The number of edges defining the boundary should be in pair (even numbers). Otherwise, a warning message is displayed in the 3D area.
  
  

This sub-topic gives additional information about the propagation of edges to perform a symmetric fill.

• In case of a subdivision surface with an odd number of edges, the fill is computed with a triangular face:

  
  
  

• In case of a subdivision surface with open edges more than the maximum number allowed ( greater than 30 edges), the fill can be computed in steps (maximum of 30 edges in a step) using Ctrl and Shift:
  
  
• In case of a surface with external edge open, symmetric fill can be computed:
  
  
• If two subdivision edges are not joined by a face, the fill is computed:
  
  
• If two subdivision edges are joined by a face, an extrusion is computed: