i have created a terrain from a height map, i have the terrain exactly how i would like it, but now i have noticed a game breaking issue which would need fixing i have attached an image, when the terrain reaches a certain height i get this line all around. now i have checked the island map and its exactly the same, but they have the water plane sitting just above this line and the walk-able terrain is higher, in game anything below the line has a reflection like water ripples, and the particles you seen in the image, if i walk above this line the reflection go and so do the particles.
i would like to ask you if it possible to fix this or would i need to recreate the terrain with some sort of height offset. i hope there is an easy solution to this problem. i would like to make this much lower ( to where my water plane is now possibly )