No glow through walls

What Feature would you like to see included within TaleSpire?
I don’t know if this would be considered a feature, but I’ll state it anyways. When you use any lights, gems that glow, etc, they shine right through the walls. Can this be turned off so that walls and surfaces would block the light?

What situations would this Feature be useful?
If you don’t want the glowing crystal room next to the room you are in to be revealed yet, or if you don’t want to illuminate an alleyway with glowing blue light (or green, or any), and basically any situation this comes up in.

Additional Thoughts/Details