I have been playing a world/server with buildcraft 2.2.2 and I just installed IC2 1.15 on it.
My question is:
After installing IC2 onto my server (Yes it worked) will I find copper where it wasn't before? Since the world is already generated, would it replace blocks with copper or tin? Or rubber trees? Or will these things only be found if I explore a new area that hasn't been explored yet / make a new world?
Thanks.