So I just added this script to my project : https://www.assetstore.unity3d.com/en/#!/content/11278 Since this script only draws the lines on gizmos, I wanted to add a LineRenderer, so that I can draw the lines also in GameView. So I simply wrote :

public LineRenderer lr;

But this variable never appears in my inspector, can anybody explain me why this happens and how I could fix it?