How do I achieve this effect?

Instead of

I'm using a layer called "Lighting" of which is blackness covering the screen. I have a light sprite which creates the effect of lighting using "force own texture". But I'd like there to be a way for light to hit a wall, but only pass through a tiny section of it. Even if I need a tiled background to prevent the light sprite, it would be nice to know if I can make this happen.

Experiment:

https://www.dropbox.com/s/66dboem8k5ux2 ... .capx?dl=0

You can measure the distance between the player and the wall, and set the light width to it, so it does not move outside the wall.