Water plane is not infinite
The water plane is not infinite. This manifests as an issue if you set a very high view distance with distant terrain enabled and landmass mods that add things very far away from Vvardenfell: (Such as P:C's Stirk, or SHotN's The Reach) You can see the ocean floor plane beyond where the water plane ends. I will illustrate this with a screenshot attached.
(RM-3790 from redmine: created on 2017-03-17 by Malcolm Mallardi, )