I can assist you
- Make sure you painted your landmass. All grass works
- You should set your LOCATION Z to like -14000 to start
- Look for a “silver” line that runs your entire landmass, or, dark areas in the paint. Thats showing you “ocean level”
- Once the water is set, right on that line, best you can … lay the rest and try to size it up
- Top left “perspective” > change it to “side”
- You can use arrow keys to small adjust
… or
Open the Island map
copy bp_islandwaterplane + volume + postprocess > open your map > paste