keithcurtis said: For really large maps, I follow the recommendation to split it into 2-4 pieces, though. My experience has found that maps up to 5000x5000 pixels, works well as one large map file in .jpg format. That's enough for a Roll20 Page-Size around 71x71 units at 100% zoom. Anything larger than a cut-off point somewhere around 5500x5500, works better split into tiles. A very large map page in Roll20 might have up to 4 tiles this large, making 140x140 units of page size. I've run larger than that too (6 tiles this size). Once you're up to sizes like this, it's beyond what Dynamic Light can handle (DL gives warnings above 50x50 units or so, and maxes out at around 100x100 units from my experimentation so far), and Advanced Fog Of War can get laggy. However the 140x140 and larger page sizes still work beautifully (not a lot of lag, maybe a little) with regular Fog Of War on, and DL turned off.