Hello Daniel, You aren't the only one who has dealt with this very issue. From what I gather, what's happening is that something on your browser is interfering with the Javascript attempting to obscure the map for you. As a player who's dealing with this bug, what you might be able to uncover may help us a great deal, since most reports we get on this issue are GMs who aren't actually dealing with said problem directly. First thing you want to go over is the basics, as in the first three steps of our guide to Solving Technical Issues Step 1: Make sure to use the right browser Please check if these issues persist when using both Chrome and Firefox. Step 2: Ensure that there are no extensions/addons interfering with Roll20 Please disable all add-ons/extensions and anti-virus programs. Step 3: Clear your cache If none of the above succeeds, please thoroughly work through Step 4 . (Don't forget the complete Console Log!) If you're still seeing right through a GM's dynamic lighting layer at step 4, I'm hoping a console log may uncover something.