After some discussions in the forums, I decided to finally add the ability to hide NPC tokens and lights behind walls.
Prior to this, you needed to have both line of sight and "opaque line of sight" toggled on.
With this new setting, you can hide NPC/lights regardless of the main line of sight settings.
Where this will come in handy is if you are exploring a dungeon with persistent fog of war and you explore a room to reveal it, find an NPC, then the players leave the room. If you didn't have opaque line of sight enabled (because you wanted players to be able to see where they have been, even if they are not currently there) this would cause a problem because players would still be able to see NPC's light sources in the room they explored but are no longer in.
This fixes that.
Really, you can probably just use this (it's on by default) INSTEAD of line of sight entirely. It uses much less resources. But I kept all the options because I know there are some specific scenarios where they will come in handy.
With this new update, I really do think the lighting system is about as complete as it will ever be. Maybe some dark vision stuff instead of just torches, but that is a maybe. I feel like it will add quit a bit to the UI for not a lot of benefit (just monochrome after all).
Anyhow, as usual please leave a review if you haven't already. Thanks!