I'll be having the fog of war checked on when I release my game. You're right, it is a better game with the fog of war checked on. But while I'm creating my game, it's off. That's what meets my needs. You may need to see the fog of war while you're creating it.
440x440 is the default size of your map pictures in order for the fog of war to be correct in the default map space. If you change the inside size of your map space, then you'll need to change the size of your map pictures to exactly match the pixels of your inside map space.
Here's why: When the Player plays the game and wants to see the map picture, he clicks on map. Coldstone has that interface graphic (copied from the medieval game), and in the middle of that graphic is the entire map picture measured in pixels. You can change the size of that by going to options and identifying that map interface. (Do not confuse the map interface with the main interface.) There's a red box that allows you to change the size of the "hole" that the map picture fits into. The size of that red box, in pixels, must exactly match the size of your map picture, in pixels. If it doesn't, then the "X" that identifies the Player's location on the map will be incorrect. So, map picture size in pixels = map interface "hole" in pixels.
Anyone making a plug-in for POG must keep their map picture dimensions at 440 pixels x 440 pixels. That's because the hole in the map interface is set to 440x440 and you can't change it. Anyone making a stand-alone game can adjust it to whatever they want as long as map-pic-dimensions = map-interface-hole-dimensions.
That the engine reads movement tiles to know where to place the "X" is a different issue. Gotta get your map picture dimensions right first.