Scott C. said: Stephen, what happens if you have multiple tokens on the board? Will only the token that is in position to see past the DL wall see, or will all tokens be able to see past it? All tokens will be able to see past it. Since it works by moving the wall between the GM and DL layers depending on on player tokens' positions, if at least one token is within the viewing area, then the wall will be on the GM layer and therefore everyone can see through it. This is one of the limitations of implementing this through the API. A solution that allows each player token to have their own perspective would require changes to the WebGL code that actually runs the dynamic lighting. I elaborate on this a bit further in the script's readme file. With all this said, only tokens that represent characters and are controlled by players will affect the one-way dynamic lighting walls.So you'll be fine with hiding a bunch of monster/npc tokens up on your ledges and other one-way lighting areas.