In Ovito, there are following modifications to the view,

  • Common neighbor analysis (CNA)
  • Expression select
  • Delete selected particles

So you can use CNA to identify which atoms are FCC-like and which are not. Then you can select FCC atoms using Expression select by adding the following expression into the Boolean expression: text box,

StructureType == 1

And by adding Delete selected particles modification, you can see only non-FCC atoms in the view.