2 Unrelated Questions

The first is a technical question that I'm only asking as a preliminary to avoid problems later on while I'm sealing up everything. The second is just to save me the time of having to go through and check it myself. The

1. How do Area Portals interact with glass? I know Area Portals can't touch water (right?), and I understand how they work in terms of sealing off the rooms/buildings/whatever they cover, but will a glass-textured brush (like a window) leave a hole that will break the seal? Or do I need to put an Area Portal over top of the glass brush?

2. What shades of mud in the Swamp Pack textures are the same? I have displacements setup so that Area X will be primarily grass fading to mud, and Area Y, adjacent to it, will fade from that mud to a darker mud. So far, I haven't been able to mix-and-match the swamp textures so that they blend right. Is there a way to do this or should I just make them all the same texture and go straight from grass to one shade of mud? (It seems a waste to not use all those lovely muds, though).

Seba said:

APs can touch water, just not go through it (so you should have one above the water plane and one below).

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Wait, really? Would those two area portals be touching or 1 HU apart? Do you need both of them?

The sort of situation I'm specifically dealing with is little water doors in the floor, like the things around midpoint in Well and Freight. I had assumed I would just area portal off the little rooms they're in because I'd been warned on no uncertain terms that Very Bad Things will happen if my area portals meet water.