I'm sure this has been suggested a bunch of times I'm betting, but I'm going to weigh in my vote on this as well. I've been supporting Roll20 over a decade now. So I hope to see something implemented very soon concerning this. We need a tool to cover/highlight/mark areas on the map with its own personal visibility settings. Specifically with areas of darkness (the kind light sources cannot penetrate) and with fog. And/Or if Tokens can be set with a much shorter area of vision (such as setting a Token to where it cannot see past a certain distance such as 30 feet or 5 feet). Tokens need a "Range of Vision" setting. Running D&D and Pathfinder, we have many scenarios where someone covers an area with thick fog (where visibility is limited to 5 feet of distance) or complete darkness (where there's none at all, no matter what light sources are present, until the token moves out the area). It would be great if a Token could not see into an area of thick fog or darkness, and when the token moves into it, their range of vision is either gone or limited.