Questions about DistanceField

I would like to use the GlobalDistaneField feature to construct a relatively large coastline-like look. So I implemented the surfacing process using the DistanceToNearestSurface node of the water surface material. However, I am having a problem with culling at a certain distance as shown in the white border of the reference image. I found that I can adjust the culling distance from the GlobalDistanceFieldViewDistance (yellow box) in the world setting, but it does not work. The default value is 20000, but changing this value does not change the appearance. I don’t know if there is a problem with the engine in the first place or if my method is wrong, but does anyone know a solution to this problem?