title: Blender model turning black when scaled down in Unity
body: <p>I made a model in Blender, which I would like to import into Unity.</p>
  <p>When importing into Blender, at full scale, the colours show up correctly :</p>
  <p><a href="https://i.stack.imgur.com/Wjcxb.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Wjcxb.png" alt="enter image description here" /></a></p>
  <p>However, I need to scale it down (the original model is very large). And when I do so, all the colours turn black. All of a sudden, once passed a seemingly arbitrary threshold :</p>
  <p><a href="https://i.stack.imgur.com/CzjnC.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CzjnC.png" alt="enter image description here" /></a></p>
  <p>I tried UV unwrapping in Blender, as well as fixing normals (inside and outside). But it doesn't fix this problem.</p>
  <p>What could be the cause of this?</p>