Z fighting on coast

I'd like to stop z fighting on z coast as well, see here?

Okay, I looked it up on Wikipedia, but yeah, your title is kinda confusing, haha. And I can't see what you're talking about.

I see this too from time to time, particularly when founding a city near cliffs. The cliffs are static 3d models, and the ground is variable in height. This creates a break when the height of the land is re-formed. The break appears as yellow flickering squares.

I still think it is a shame naval units and movement aren't included.  Could make for interesting surprise invasions along an otherwise ignored coastline.