How to add a light cut off point like sidescrollers 3D games do in the forward ground?

Hey imma ask for help myself if any one has any pointers on how to do this. Ive been scratching my brain around this problem for quite a while now but no luck into figuring how to make this happen. Ive started playing this game called F.I.S.T forged in shadow torch(Made with UE4) and I wanted to bring the nice light cut off fx to the forwardground in our game design cause I think it would really add a lot to the scenes environments. Ive tried a bunch of different approach but always hit a wall.

  • Material function with a direct light would of been nice… but the rest of the lights and reflections always still leaks out of the zone so that doesnt work.
  • Might be something in the post process materials but then again I am not sure how I would position it in the world space to select the desired distance fade to begin.:confused:

Any pointers in the right direction would be more then appreciated. :smile: Thanks