I've been reading forum posts for awhile now and I've checked out tutorials, but I am just not getting the hang of this. I can't seem to sort out the differences between walls, masks, and edges and how to set them up. Here's my understanding: Walls are used to prevent light and token line-of-sight. So, if I have a room with a light source, that light will not bleed into other areas through a wall even if both masks are revealed. Masks create fog of war over areas. Masks can be revealed manually or by token movement. Edges are for things like doors and pillars and prevent line of sight (i.e. they cast shadows) but still allow the object to be seen. I realize this may be part of my problem, so if my understanding of any of these pieces is wrong, please tell me. So, with that understanding, I'm trying to make what I think is a simple map. The problem is, walls seem to be stopping all visibility - even for tokens with a light source. I've tried using some of the advice I've seen on the threads, but nothing seems to work. I'm using version 3.6.11 and I have attached my map. I would appreciate any help. I'm sure I've just got it set up wrong, but I just can't seem to figure it out on my own. (I'm coming from a lot of MapTools experience, which could be messing up my understanding of how it all works in d20pro.) Second Question: How do you handle creatures with darkvision and/or low-light vision?