Your <code>dungeon.dat</code> data file should reside in <code>Script/dungeons</code> where it will automatically be picked up by the game when it creates the world map.

The data file <code>owterra.dat</code> contains the "over-world terrains" of the IVAN world map. These are so named, because they become the little pictures that sit over the ground terrain on the world map. They denote the places - cities or dungeons - you can visit when adventuring in the world map, and so they need to be linked up to the dungeon data files. Pictures showing famous owterrains... This table shows the control variables for each over-world terrain: {| class="wikitable"! Keyword! Values! Description|-| <code>BitmapPos</code>| <code>x, y;</code>| This determines the bitmap position of the picture of the terrain in <code>WTerra.pcx</code>|-| <code>NameStem</code>| <code>"string"</code>| This is a string, beginning with a lowercase word, usually a noun or an adjective, for example, "mighty cathedral" or "cave entrance"|-| <code>UsesLongArticle</code>| <code>true</code> or <code>false</code>| |-| <code>IsAbstract</code>| <code>true</code> or <code>false</code>| |-| <code>CanBeGenerated</code>| <code>true</code> or <code>false</code>| |-| <code>AttachedDungeon</code>| <code>DEFINED_VALUE</code>| |-| <code>AttachedArea</code>| <code>0, 1, 2, ...</code>| |-| <code>RevealEnvironmentInitially</code>| <code>true</code> or <code>false</code>| |-| <code>NativeGTerrainType</code>| <code>DEFINED_VALUE</code>| MUST be non-zero. Can select from <code>DESERT</code>, <code>JUNGLE</code>, <code>STEPPE</code>, <code>LEAFY_FOREST</code>, <code>EVERGREEN_FOREST</code>, <code>TUNDRA</code>, <code>GLACIER</code>. Note that the tundra type produces the familiar snow terrain.|}