Thank you for your answer but i thing you don’t understand my problem or i don’t understand your answer. I don’t need to know if it is the preview because i just need to do the same thing on the preview than on the placed object and this is what i’m trying to do and this same thing that don’t work. I’m using the BegginPlay event and this event fire twice ONLY IN DEV KIT or SINGLE PLAYER. It never fire on dedicated for the preview structure, here is my problem. I’m unable to change anything on the preview structure because this event don’t fire for it and i don’t know how to access this instance otherwise.