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I'm looking to accurately subdivide a face. Please walk with me.

  • I have an object on my screen. In the edit mode, I'm looking subdivide that face. enter image description here

  • I select the immediate top left vertex and the immediate top right vertex, subdivided it to create a vertex in the middle. I did the same to the immediate bottom left and right vertex enter image description here

  • I select the newly created vertices and tap on the F button to join both vertices; It created an edge. Now the face is divided. It looks like it's divided, but apparently it isn't. enter image description here

  • If I try to select a face either on the right or left, the whole face is selected. So it pretty much looks like the face wasn't divided at all. enter image description here

Here is what worked:

  • I selected the whole face, right-clicked, subdivided it, and then dissolved the horizontal edges. It looked neat. enter image description here

My question is: Why didn't it subdivide properly in the first attempt?

Thank you.

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    $\begingroup$ Use Ctrl-J to join the vertices, create the edge, and subdivide the Face. 'F' will just create a disconnected edge between them but not subdivide the face. You can demonstrate that by subdividing the edge created with 'F', selecting the centre vert, and moving it up with G Z. $\endgroup$
    – John Eason
    Commented May 17 at 16:59
  • $\begingroup$ @JohnEason Ctrl+J or J? With Ctrl+J you join objects in Object Mode. $\endgroup$
    – Gordon Brinkmann
    Commented May 17 at 17:36
  • $\begingroup$ @GordonBrinkmann Sorry, just 'J'. Had other things on my mind this week! I'm sure I did an answer here with an animated Gif explaining this a while ago but can't find it now. $\endgroup$
    – John Eason
    Commented May 17 at 18:13

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F is for New Edge/Face from Vertices so it does that - it creates a new face or edge from vertices that can be separate from other geometry between those vertices, and it does not and is not supposed to divide faces.

enter image description here

Concect Vertex Path( J ) just below it in the Vertex menu( Ctrl + V ) does connect vertices with a path on surface dividing existing geometry:

enter image description here

However if you want to subdivide geometry, you can do just that with Subdivide operation alone. You just need to select the correct geometry to get your result - in this case that would be 2 edges of the face:

enter image description here

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