Hello black fatigue, in the top right corner of the landscape or city creation screen, there is a thumbnail or picture.

When you activate the mod, two little white arrows will appear on the thumbnail. Pressing the right arrow will switch to the activated landscape.

dumb question, how to activate this?

Updated the description to preface my comment below, so newcomers are not confused.

Hello OGbaba, "Davy Jones" adds a flooded landscape to Dystopika.

So... What does this do?

ooo thats hella cool

Hello Mr House, yes, it is a flooded or sea or ocean-filled landscape.

Sooooo.... it's a ocean covered build space ?