Currently working on this...

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Still undecided as to whether it should be a crosser or terrain. So far I only have two tiles, and they are both only partially complete.
and...
Two tiles finished, except for the walkmeshes. Screenshots from NWN Explorer.

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Click image for larger view
Most likely going to make this a crosser. Thought about making it a terrain, but that would mean duplicating every feature and group that is available in the City tileset.
Working on a third tile now. I HATE texture-mapping. Just when I think I have something mapped the way I want it, I start a new tile and decide I don't like the way it looks. Now I have to go back and change the other tiles to match the new mapping.