I have two water brushes that is basically a strean that leads into a large pool. I have created the brushes correctly. Surrounded the sides with nodraw_water. However, when you move from the stream brush into the pool brush and are under water, your man takes a breath because they are two seperate brushes (My thinking). Anyone have any idea's how to merge these two brushes into one or stop this effect?

Thanks again!

I was looking at the merge option the other evening. I think its on the menu with CSG Subtract and Hollow. Usually when I cut a hole in a wall doorway etc. it usually splits the wall in four pieces. I built a test wall and cut a hole in it.
The wall is split in four sections now. I selected two of the sections and then selected the Merge option. The two pieces were joined as one. The only problem is that it would not join all four pieces. It seems that it will only work on certain types of splits or it depends on the direction you are trying to merge. Try it out, but be sure to save your work beforehand. Hope that helps. ;)

The easiest wasy to think of the merge button, is to ask yourself.. can these two brushes be replaced by once single brush, without having to clip that one brush?

[]
[] <-Could be merged

[]
[ ] <-Can not me merged