Method is now called

src/engine/InterestManagement/Terrain.java

@@ -102,17 +102,26 @@ public class Terrain {
         // Retrieve the next zone with a terrain defined.
 
         Zone terrainZone = getNextZoneWithTerrain(zone);
+        Zone parentZone = getNextZoneWithTerrain(zone);
 
         // Transform world loc into zone space coordinate system
 
         Vector2f terrainLoc = ZoneManager.worldToTerrainSpace(world_loc, terrainZone);
+        Vector2f terrainOffset = ZoneManager.worldToZoneOffset(world_loc, terrainZone);
+        Vector2f parentLoc = ZoneManager.worldToTerrainSpace(world_loc, parentZone);
 
         // Interpolate height for this position in terrain
 
         float interpolatedChildHeight = terrainZone.terrain.getInterpolatedTerrainHeight(terrainLoc);
         interpolatedChildHeight += terrainZone.global_height;
 
-        return interpolatedChildHeight;
+        float interpolatedParentTerrainHeight = parentZone.terrain.getInterpolatedTerrainHeight(parentLoc);
+        interpolatedParentTerrainHeight += parentZone.global_height;
+
+        // Blend between terrains
+
+        return interpolatedChildHeight + interpolatedParentTerrainHeight * (1 - terrainZone.terrain.terrainBlend(terrainOffset));
+
     }
 
     public static float getWorldHeight(Vector3fImmutable world_loc) {