I created this edge by linking the two vertices directly (Make Edge / Face):

enter image description here

Now I would like to split the quad face below along this loose edge. What is the solution for the general case where the edge crosses multiple coplanar faces?


AFAIK, there is no way to use an edge (without even a plane) to divide a face.

What you need to do is delete the edge (x->edge) and then join the two verts, by selecting them and hitting 'j'.

If you've made a bunch of edges not realizing what you were doing in some other model, you can use mesh->cleanup->delete loose to delete all these edges, but I don't believe there's any way to transform them into cuts.

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  • $\begingroup$ Actually you don't have to delete the edge first. With the loose edge selected J will still cut the underlying face, turning the loose edge into an edge between faces. You can use Select Loose Geometry to find the edges you want to fix. $\endgroup$ – sambler Jul 6 '18 at 5:51
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    $\begingroup$ @sambler You don't have to delete the edge first, but you do have to delete the edge. $\endgroup$ – Nathan Jul 6 '18 at 6:38
  • $\begingroup$ Right you are, easy to miss two edges in the same position. $\endgroup$ – sambler Jul 6 '18 at 6:47

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