How to add a custom map

conf\grf-files.txt //----------------------------------------- // GRF Files // Add as many as needed. //----------------------------------------- grf: D:\Ragnarok\client\rdata.grf grf: D:\Ragnarok\client\data.grf //----------------------------------------- // Data Directory // Use the base folder, not the data\ path. //----------------------------------------- data_dir: D:\Ragnarok\client\
conf\map\maps.conf
"arathi",
db\map_index.txt
arathi 1250

For rAthena, just double-click mapcache.bat. Done

Hercules has these extra steps

1. add mapcache.c plugin into conf/plugins.conf
plugins_list: [ /* Enable HPMHooking when plugins in use rely on Hooking */ //"HPMHooking", //"db2sql", //"sample", //"other", "mapcache", ]

2. add mapcache as a project in visual studio. See how to install a plugin.

3. [Windows Key] + [R] -> type cmd

4. point to your Hercules emulator folder, and type map-server.exe --help

5. type map-server.exe --map arathi

Once get the hang of it, there is a faster method with Windows

3. point to your map-server.exe, and create shortcut

4. right-click, Properties, and edit the Target:
D:\Ragnarok\Hercules\map-server.exe --map arathi

External Links:

Adding a custom mapcache file