I want to use Roll20 with it's 'Fog of War" and "Dynamic Lighting" as the battle-map surface on a large shared flat screen which we use to put our minis on. I want to be able to utilize the game on my computer as a the GM, but for the central flat screen to show what the PCs would see. Is there a way to adjust the settings to allow this? So far, the only thing I've come up with is to have two computers - one connected to the flat screen logged in as a PC and the other computer set to operate as a the GM. Is that the only way? Thanks