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I have a tube that has too many edge rings. I would like to reduce them with a 10:1 ratio or something similar. When I try and use a decimate modifier I get bad topology. Is there a non-manual way to do this?

enter image description here

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In the upcoming 2.71 release there is a better way to achieve this.

  • Select edge ring (Ctrl+Alt+RMB)
  • Checker De-deselect, See note below!
  • Select -> Edge Loops
  • Mesh -> Delete -> Edge Loops

Note:

In 2.71 support has been added to deselect alternate edge-ring, See: https://developer.blender.org/T40324 This is detected automatically.


Previous answer, obsoleted by the method above

This is possible but a little cumbersome

  • In vertex mode select a loop running along the length
  • Select -> Checker De-seelct
  • Hide
  • Set edge mode
  • Unhide
  • Deselect the vertical loop
  • Select -> Edge Loop
  • Mesh -> Delete -> Edge Loop

enter image description here

Footnote, it may be worth adding a skip option to edge-ring select, which would make this only 2 steps.

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  • $\begingroup$ This is not ideal but it works. $\endgroup$ – Vader Mar 30 '14 at 12:13
  • $\begingroup$ A tool/option to select every nth edge/face ring would be awesome if it could be done ;) $\endgroup$ – gandalf3 Mar 30 '14 at 22:47
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    $\begingroup$ @gandalf3, probably we'd just add an option to the existing edge-ring select tool. $\endgroup$ – ideasman42 Mar 30 '14 at 22:50
  • $\begingroup$ Updated with a less cumbersome method. $\endgroup$ – ideasman42 May 29 '14 at 5:24
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Try using the dissolve tool... its available in the same menu as the delete options...

1: select edge/vert 2: press X 3: select your dissolve option

this basically deletes the selected edge/vert without affecting the geometry around it (ie: remove an edge without deleting the connected faces and thereby joining them)

sorry I can't find a single step (automated) way to do this...

related docs:

http://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.63/BMesh

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