Overlay a material onto terrain where a sphere hits the terrain?

So I am trying to show the user where a sphere intersects the terrain, right now I am just using a partially transparent material on a sphere. I just don’t want the whole 3d part of it. I am trying to show the range of the attacks, and how far they will make it on the terrain. Thinking maybe I can use a sphere mask some how. But I really don’t know.

This might work for you-

Decals could work, but another solution might be found in this thread:

That’s about cutting a hole in a material, but you can use the same spherical mask described there to do any kind of effect you might want.