Make a player procedure that hides enemys in first person.

Make it so that if you are in the first person you don't see a specific mob, that could be used to replace the layers. Imagine that you want to change the color of the eyes, he could have an entity that mounts him in the place of the eyes that are the color that the programmer wants, but that the player does not notice her unless he puts hiself in third person, I don't know if it's possible but it would be simple and would serve for many things.