title: Error : Tiled GPU perf. warning
body: <p>I recently ran into this problem.
  I imported a model (mesh + armature) and, when a pressed play, this message appeared:</p>
  
  <p><code>Tiled GPU perf. warning: RenderTexture color surface  (1246x535) was not cleared/discarded, doing &lt;run with profiler for info&gt;</code></p>
  
  <p>It gives me fps problems and slows the shadows processing.
  I've tried to delete the model, but it doesen't seem the cause of the problem.
  I've also found other posts that concern similar topics but they don't give a solution.</p>
  
  <p>[EDIT]
  The problem occur only in perspective view (ortographic is fine)</p>
  
  <p>Unity version : 5.5.0f3</p>