Thread:The Second Age Server/@comment-29979363-20170325124125/@comment-27219153-20170325194354

Once you make a custom map, open up the mod with 7-zip and replace the old map with the one you modified. That's it, use the modified jar to on your server and the terrain will generate according to the new map. The modified jar is not required client side for terrain generation, but it is recommended to have it client side as well so that players will be able to see the map and plan accordingly.