I want it to look like the top image when I press <kbd>P</kbd>, so it has those lines around each face.  

Like this:

![enter image description here][1]

Not like this:

![enter image description here][2]


  [1]: https://i.sstatic.net/Trxa1.png
  [2]: https://i.sstatic.net/oYfxh.png