split merged vertices

hello

 i often merge vertices unintentionally and don't realize it until much later, how do i split the vertices ?

select the vertice you want to split and press ‘v’

Of course there’s always the rip tool…
http://www.blender.org/development/release-logs/blender-240/mesh-ripping/
If you have only quads it is pretty straightforward. If you have tris though, the method is to join two tris that touch the vertice to rip using alt+J, rip, rebuild the tris using ctrl+T. It’s a pain but hey:

  1. avoid tris as much as you can;
  2. avoid to merge vertices that you don’t really want merged :wink:

J.