Whoops I was talking about the opacity of items that are on the GM layer, not the opacity/darkness of the UDL darkness. It can be helpful to reduce the opacity of the GM layer so the GM will know which items are not visible to players (keeping them at half opacity for example is usually good). The UDL Darkness opacity is found on the Page Settings, on the Dynamic Lighting Tab, at the very bottom. On your third image you have the Page Setting tab open (with Dynamic Lighting and Explorer Mode turned on). If you scroll to the bottom of that window, you'll see a slider bar for GM Darkness Opacity, so that you'll be able to adjust the darkness of areas that are not visible to tokens that have sight enabled. Again, the best way to test any of this is to use a Dummy Account , because you'll get a true player's view and experience, as well as the other benefits of using a Dummy account: checking Dynamic Lighting, streaming, testing tricks you want to do during the game, macro testing, resetting the Game's URL, etc. To use a 'dummy account', create a new player account for yourself and use that to see what your players see. If you use Gmail there's a trick to use a single email address by adding a + symbol before the @ symbol, so if your regular Gmail account is <a href="mailto:JohnDoe@gmail.com" rel="nofollow">JohnDoe@gmail.com</a> you can create a second account using <a href="mailto:JohnDoe+testaccount@gmail.com" rel="nofollow">JohnDoe+testaccount@gmail.com</a> and emails to both will be sent to your single email address. Then log into Roll20 with one account normally and log the other in using a private/incognito browsing window, which will let you see your player view 'live' without switching back and forth to 'rejoin as player'.