How to see edges of a 3D model?

Hi, i want to see all edges on my model in Unity, like this:

In unity i dont see the edges:

Any idea?

http://docs.unity3d.com/Manual/script-EdgeDetectEffectNormals.html

On your camera object

Add Component>Image Effects>Edge Detection

Make sure you have the Effects package imported

Are you talking about just in the editor?
Select “Shaded Wireframe” from the pull-down menu on the Scene Tab