What should I do when water isn't showing up in-game? I've set the water height to both cells concerned to 15900.0000. they are both the same. The water shows up in one of the cells, but not the other. which breaks the water in a really ugly way in-game. It shows all purple for the area I've intended for a river in the Construction Set as well and shows no problem there. It doesn't work in the game.

You may have a mod that changes the same area and is overriding the changes you are making.

Yeah. I found what was wrong. I had made a patch to get my mod integrated seamlessly into Unique Landscapes and that patch conflicted with my main mod in the water area. Stupid me. I should learn to create the patches last!