Hey Rodol You Should add a button on the hotbar that enables camo mode. its fully invisible when still but shimmers a little when you move. there should also be a energy bar that goes down when you enable it and it regens over time when its not active.
oh and if you hit the button while in the ship it makes the ship camo
Edit:
Like all vehicals exept the rave and anything that has the player exposed
Edit 2; You would also not be able to fire during this period, and if you or your ship takes any damage, it would shimmer a bit. The camo would be in hexagon plates and the button would look something like this: https://imgur.com/Ihq7b4t
