SSOA on walls and floors

I just want to know if there is a way to get the SSOA effects to work on walls and floors.

I'm not talking about the objects on the floors or walls or anything, I'm talking about the place where the walls and floors "collide".

So it's has a sort of shadow coming off from the edges on both sides. SSOA off of the walls.

Maybe it's not working because I'm using ProBuilder or something.

I also have the UFPSCamera, which I'm putting on the WeaponCamera.

Thanks!