title: Why is this thin black line showing in play mode but not in scene view in Unity 3D engine
body: <p>Please take a look at screenshot</p>
  
  <p><a href="https://i.stack.imgur.com/qx3Ve.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qx3Ve.jpg" alt="enter image description here"></a></p>
  
  <p>I want to hide those thin black lines in my game.</p>