In my project I create many instances of a node, but when I change the material parameter it applies to all nodes. Is it possible to somehow do a local shader or something like that?
It is possible to make a local shader?
that is actually expected behaviour, as usually you want all instances to behave the same way. If i remember correctly you can still make an instanced scene local -> rightClick the node in the scenetree and there should be an option for that.