Hello, I'm going to try and compact three things into this one topic for organization's sake. *First of all I'm wondering if someone could provide me with the information on how to create a waterfall in hammer. *Secondly, I was wondering if someone could provide me with a good explanation for making displacements. When I've used displacements thus far, I usually just create a few large brushes of the same scale that roughly covers the area I need terrain in. I was wondering if there was a better way of going about this. *Last of all, I have no knowledge of proper map optimization. I've heard a little about Hint brushes and Area Portals, but I haven't been able to get solid grasp on either.