I ported ThirteenOrange's Steam Workshop mods to SSE (for personal use only), and everything works perfectly apart from an annoying visual issue in the Seastone Manor custom worldspace/cell. The sea has a finite distance, and it looks really weird with a rectangular cutoff.
Here are some images: https://imgur.com/a/EdJexX4
Any idea how could I fix it? I am not very good with CK. The sea needs to be "extended" somehow.