I'm wondering if there's a snapping technique I could use to get a scaled edge ring to be exactly straight up and down? I can just scale and guess, by eye, that the edges that get scaled out are exactly upright, but I want to be exact, without having to set the location of each vertex manually. Thanks for any ideas.

before scaling

scaled by eye, but not exactly upright

  • $\begingroup$ You can try scaling that edge loop in Vertex select mode and snapping set to Vertex > Closest, while scaling lock axes to anything but surface of that loop (in your example above, this would be S > Shift+Z), though this way might not work for every situation. $\endgroup$ – Mr Zak Aug 25 '18 at 13:13
  • $\begingroup$ Thanks, yes this works quickly and easily, and is using snapping, which is what I was mostly wonder about how to use in this case. $\endgroup$ – frew Aug 25 '18 at 17:31
  • $\begingroup$ One note, for anyone else exploring this, I need to have button "snap onto itself" enabled here at snapping options. Maybe that's on by default. $\endgroup$ – frew Aug 25 '18 at 17:37

While this is no general answer to how to solve the snapping problem and might not work for more complex shapes, in this particular instance I think it's easier to not rely on scaling but instead use Loop Cut and Slide, cut exactly at the bottom and then manually move the added edge loop upwards. For the upwards translation you could use exact numbers or vertex snapping (while restricting the movement to the Z axis) to end up at the height of your existing loop.

loop cut and slide

  • $\begingroup$ Thanks, yes this also works very nicely, and is an option to snapping in this case. $\endgroup$ – frew Aug 25 '18 at 17:32

The slide method is given by binweg is better than scaling, because it's more general, but in this particular case, just out of interest:

  • With the transform pivot set to the center in XY
  • Set Snapping to 'Vertex' and 'Active',
  • In Vertex Mode, select the edge loop to be scaled, making a convenient vertex active
  • Scale in XY (SShiftZ) until the active vertex snaps to the one below it.
  • $\begingroup$ Thanks, this also works. Good to know about this snapping option too. $\endgroup$ – frew Aug 25 '18 at 17:33

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