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Right now I try to smooth a quite big mesh to the piont you cant realy make out the eges in the final rendering. But every methode I found was just giving no result at all or downsize the singel "mesh tiles" and by that create holes in the mesh. From my understanding i need to enlarge the mesh "resolution" witch i tried with multires BUT the simple setting does nothing at all in my case and the Catmull-Clark setting creates the mentioned holes.

Original object Original Object

Catmull multires enter image description here

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    $\begingroup$ It could be that you've hidden vertices similar to this question or there's something broken in the geometry of the mesh, e.g. disconnected areas. $\endgroup$ Commented Apr 8, 2020 at 9:26

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As @RobertGützkow pointed out, this is caused by disconnected vertices.

  1. Select all vertices (Select > All), A
  2. Go Mesh > Clean Up > Merge By distance, Alt+M
  3. Done.

enter image description here

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    $\begingroup$ This problem is caused by applying the "Edge Split" modifier to the mesh before the subdivision modifier. and this is the right answer to fix this problem :) $\endgroup$ Commented Apr 8, 2020 at 10:39
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    $\begingroup$ This can also happen during import - that faces are imported as separated, without any modifier applied :). $\endgroup$ Commented Apr 8, 2020 at 10:41
  • $\begingroup$ Tanks guys worked great :D $\endgroup$ Commented Apr 8, 2020 at 11:09

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