Help with Terrain Editor

So I want to make a really big ocean but when I use the terrain edditer, it laggs a lot and is slow. Is there any other way I can do this?

Use terrain water until you reach about 1500~2000 studs away, then use a part that looks blue.

A lot of the lag will come down to computer performance. If you have an older computer, it will lag no matter what you do. Remember that the map doesn’t need to be super big. 4000x4000 is a good size for something medium. To help reduce the lag, you can make the height of the water maybe 10-40. Remember that if you max out the size there will be a lot of unnecessary lag, and the water doesn’t need to be 16000 studs deep.