Operating System Windows Windows 8.1 Screen Resolution 1600 x 900 Web Browser Chrome 37.0.2062.124 Browser Size 1600 x 775 Color Depth 24 Javascript Yes Flash Version 15.0.-1 Cookies Yes User Agent Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2062.124 Safari/537.36  It's only a 30 in x 30 in map (3.5mb, 2047px sq), but if I zoom in or out, the performance just dies as player and GM. This also happens on Firefox. There is a little bit of dynamic lighting, but only four lines and five lights. Performance at 100% works just fine though.