Thought about it, but I don't think so. This trigger is used for something like a house, whereas the area you're not in is black (and my situation is not an indoor thing). My request is simply...remove black areas you'd normally have to walk near to see. I thought this was done somewhere in the game but maybe it's not. It seems like something very simple.
It's kind of needed just because of how bad it looks in the shroud. The island is at such a height that you only see a tiny bit of water with the camera, and then the shroud makes it look...just bad, haha. Worst comes to worst, I'll remove it all or something.
-Edit- Oh wait, it seems like the vision is obscured because of the terrain dimensions. How do you make it so a character's vision extends beyond the terrain to one that may be beyond it? Or...am I screwed there? -_- Makes little sense since setting HideShroud to true would show the water (and the water is an item beyond the terrain)...the heck.