there isnt a feature yet in the surfsub modifier to make its funtion in a vertex group instead of all the hole mesh. that would be very usefull for modelling a small part of a mesh that you want to detail or smooth instead of all the mesh, simply assigning the faces that you want to a group and then you would go to the modifier and set it up to affect only that vertex group.

  • 1
    $\begingroup$ There is no necessity for vertex groups to be contiguous set of faces, or even have any faces. How would the boundaries be generated without ngons? Consider instead the multi-resolution modifier. $\endgroup$
    – batFINGER
    Apr 18, 2019 at 17:26
  • 3
    $\begingroup$ You can make subdivisons in edit mode. Just select the area what you want, hit W then S (for simple) or U (for smooth). Then you can adjust the factor or the repeat count in the left side panel. $\endgroup$
    – FFeller
    Apr 18, 2019 at 17:32
  • $\begingroup$ @batFINGER but multiresolution its for sculpting? $\endgroup$ Apr 18, 2019 at 19:36
  • $\begingroup$ @FFeller -- does this option still exist in 3.5.1? Not finding it. $\endgroup$
    – james_t
    Jun 4 at 19:42
  • $\begingroup$ @james_t You can find the Subdivide tool in the Edge menu in Edit mode $\endgroup$
    – FFeller
    Jun 5 at 6:19


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