Help! I can't change the texture/map of a prefab I duplicated without also changing the original Prefab in unity game engine!
Does this sound like the problem? You duplicated a prefab in Unity and when you go to change it's texture, map or colour you find the original prefab changes too? You ask yourself; Is this an instance? Are the prefabs connected? Do I have to somehow ungroup them, disconnect them or break them?
from Andrew Brett Watson.com