Open ocean best practise or how to delete the island of he ocean water actor

I’m trying to understand your tutorial, but I’m not entirely there so far…

The bit about “allowing to keep the landscape under it” is confusing me, because the point is that I don’t want any landscape at all (preferrably, not even have that plugin enabled).

After making the changes, that annoying spline is still there, and attempting to put all spline points at 0,0,0 crashes the engine!