Apparently you need to have Hardware Acceleration enabled in Chrome if you want to use Dynamic lighting. I can't see that mentioned on <a href="https://wiki.roll20.net/Dynamic_Lighting" rel="nofollow">https://wiki.roll20.net/Dynamic_Lighting</a>. If I disable Hardware Acceleration in my Chrome browser (Version 56.0.2924.87 (64-bit)) maps with Dynamic Lighting freeze and is unplayable for me (works fine for other players at the same time). When I enable it again it the scene renders just fine. Why is this a problem? I prefer to have Hardware Acceleration off in Chrome, since when I watch Twitch while playing a 3D game Twitch stutters. My only option at the moment is to manually change this setting in Chrome whenever I want to use Roll20/Twitch, which is quite annoying. I have suggested Twitch to give the option to turn off Hardware Acceleration in their player independent of the Browser setting. For Roll20 I think at least one of three things should be done: 1 - Update the Dynamic Lighting FAQ saying that Hardware Acceleration in your browser is a requirement for it to work. 2 - Change so that dynamic lighting still works with Hardware Acceleration disabled 3 - Give a warning when trying to load a scene with Dynamic Lighting enabled when Hardware Acceleration is disabled in the browser.