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.