title: Why does Unity does not import materials of .DAE file?
body: <p>I'm trying to upload a DAE file (Exported from SketchUp) into Unity3D.</p>
  <p>It imports the meshes, but all of them are grey. I guess it imports materials too, but all materials become grey or something. Here are the pictures of what I mean :</p>
  <p>SketchUp :
  <img src="https://i.stack.imgur.com/oSmbF.jpg" alt="enter image description here" /></p>
  <p>Unity :
  <img src="https://i.stack.imgur.com/6xx9R.png" alt="enter image description here" /></p>
  <p>How can I import the materials with colors (or textures) ?</p>