How Create an isle surrounded by sea

[Jamendxman3]

@Devfo Studios;435845

Use the Landscape tools to create some definition to your current landscape plane. Then create another plane and set the Z axis the same as your current plane. then assign a water material to the new plane.
There are other ways to do this, but this should get you started.

I have always wondered, is there some special shape for a plane? Like just a plain square that I can use for my oceans?