Lovely swamp feeling, thats for sure. The water might be a bit too "clean" at some points, but thats being picky. Anyways, about the problem. In my case, this happened many times when I was new to terraining, and I never figured out how to fix it, but in all my cases I simlpy had to wait for some time, a week or two, and then it would be just fine, not saying that will happen to you, but thats my case. Now'a days it doesn't happen at all, somehow I believe it has something to do with the PC >.>