Water has Jagged Edges at Borders of Map???

When using Water4, the Borders of the water are jagged. I’m making a map and would like the borders to just stop instead of overlapping as jagged edges onto the “tabletop” behind the map. Any clue what’s going wrong?

[Bad Water Edges]: Imgur: The magic of the Internet

Try to edit the parameters of the water 4 material of unity you can play with the options of the material to get the ideal water for your project