Height from zone center.

src/engine/InterestManagement/Terrain.java

@@ -120,7 +120,7 @@ public class Terrain {
         // Transform world loc into zone space coordinate system
 
         Vector2f terrainLoc = ZoneManager.worldToTerrainSpace(world_loc, terrainZone);
-        Vector2f parentLoc = ZoneManager.worldToTerrainSpace(parentZone.getLoc(), parentZone);
+        Vector2f parentLoc = ZoneManager.worldToTerrainSpace(terrainZone.getLoc(), parentZone);
 
         // Offset from origin needed for blending function