Newbie to UDK here.
Creating a level for my final project for a class.

Followed the directions to creating a water-volume (for a swimming area) at this link:

My problem happens when I enable DoF in the post-process volume. Rather than affect the interior of the volume, the post process occurs OUTSIDE of the volume (ie: if I play outside of the water, everything is fuzzy, if I dive in, then it becomes clear).

Pic of the problem here:

What's going on? Please, keep in mind, I'm a newbie to this stuff.