I was trying to use dynamic lighting for a map recently, but it didn't work. Everything looked good on my end; tokens were emitting bright areas which appeared to be respecting the polygons I drew on the dynamic lighting layer, but when the players got onto the map everything was just blackness for them. At first we thought that it was a loading issue, but when I turned dynamic lighting off and went to the regular fog of war they could see the revealed areas fine. The players were using Chrome on Windows 7 and Windows 8 laptops; I use Chrome on Windows 8. I'm a supporter but they're not. Dynamic Lightning was set to on, with "Only update on drop" selected. I tried dragging & dropping some tokens but that didn't help the situation for them.