Transparent faces on exported FBX So I am trying to make a model, and in Blender 3D it looks fine, but when I export it to FBX and import it into Unity 3D or Unreal Editor 4 or any other 3D viewing software, you can see inside of it which makes it really ugly.

Screenshot:
You have inverted normals. 

In edit mode, select all faces (A), then do CtrlN. 

The object should turn from blueish to greyish, which means that your normals are now correctly pointing outwards.