I use a Pro account for Roll20 for some months now and I have several recurring issues with the Dynamic Lightning. Especially, there is a big difference with what my players see and they are supposed to see according to the app. First screenshot : What my player see when I use Ctrl+L to mimic their vision Second screenshot : what my player actual sees As you can see, they are several light source on the map, they seem to not work on the first screenshot when they work to good on the second, because the player can see beyond what's blocked (second screen, the room with a fire giant). For now, all my players see all the rooms where I put light source. Some spoilers where made... Thank you for the help, Tibo aka Tebor, french DM