If you add new tiles, you may have to renumber the existing ones to keep them in the correct position. In Worldmap.txt, the line 'num_horizontal_tiles=4' can be set to 5 (or more, it isn't know what the maximum value is), producing the following layout: The Worldmap.txt line 'num_horizontal_tiles=4' controls this. The standard number of tiles (350X300) is 4 per row, starting with 0 - 3. When you open that folder you can see wrldmp00.msk, wrldmp04.msk, and so on, but why there aren't wrldmp01.msk or wrldmp02.msk? Because if there is no water on a tile, no mask is needed.įrom the file names wrldmp00.msk you can see that the corresponding WRLDMP00.FRM has a masked area where black is impassable. msk files are used to literally mask the area to prevent player from walking over it. Whenever there is water or any other impassable area on the world map. So, what's stopping the player from walking over the water area? So there are 20 FRM files each is 350x300 pixels.
The world map is a group of FRM files in order: WRLDMP00.FRM - WRLDMP19.FRM.
