How do you make field of vision work with light sources such as torches? For example, my character has 60ft dark vision, so when there is no light source, and with field of vision enabled, I see dim light only in the direction im facing. However, if you introduce a light source, such as a torch, and place it behind me, it allows you to see even if you aren't facing in that direction. It basically ruins the field of vision setting. What would be the fix to this?