While I was working on this answer How can I smoothly connect 2 faces with a curve?. I noticed something weird when two (2) faces are intersecting each other and sharing exactly the same vertices. You would have to tap J twice even though on the second tap, there is already an edge connecting them.

Here's my setup: Make sure you're in Edit Mode and tick the Auto Merge checkbox and the Split Edges & Faces checkbox under Active Tool and Workspace Settings. Then have two (2) planes intersect each other which will automatically create two (2) additional shared vertices.

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Notice that on the first J only 1 face gets cut. I would expect both faces to be cut or else we wouldn't know which face to give priority while cutting. And even though there is already an edge between the vertex pair, tap J again anyway, which will then cut the second face. I'm not sure if this is intended behavior and what the reasons behind this are or should I report it as a bug?

  • 1
    $\begingroup$ Interesting.. (the 'Split Edges & Faces' tip in the previous answer is great) . You don't need the re-selection for it to work; a quick 'JJ' does the job... Personally, I'm OK with a single key-press representing a single operation, and thinking of 2 cuts as 2 operations.. but not knowing which is which is maybe a bit dicky,, $\endgroup$
    – Robin Betts
    Commented Aug 27, 2022 at 11:16
  • $\begingroup$ yeah exactly i can just do the double j tap, anyway there would never be a scenario wer i needed just one j tap 😁 $\endgroup$
    – Harry McKenzie
    Commented Aug 27, 2022 at 12:33


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