Opposite of 1006300 created as 1006301.

src/engine/objects/Zone.java

@@ -107,9 +107,11 @@ public class Zone extends AbstractGameObject {
             if (this.guild_zone) {
                 this.max_blend = 128;
                 this.min_blend = 128;
+                this.terrain_max_y = 5;
                 this.major_radius = (int) Enum.CityBoundsType.ZONE.halfExtents;
                 this.minor_radius = (int) Enum.CityBoundsType.ZONE.halfExtents;
-                this.terrain_type = "PLANAR";
+                this.terrain_type = "TARGA";
+                this.terrain_image = 1006301;
             }
 
             if (this.terrain_type.equals("NONE"))

src/engine/util/MapLoader.java

@@ -18,6 +18,7 @@ import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.Arrays;
 import java.util.stream.Stream;
 
 public enum MapLoader {
@@ -137,6 +138,16 @@ public enum MapLoader {
 
             });  // Try with resources block
 
+            // Generate full white alternate to 1600300
+            // Declare and initialize an array of short[16][16]
+
+            short[][] heightMapEntry = new short[16][16];
+
+            for (short[] shorts : heightMapEntry)
+                Arrays.fill(shorts, (short) 255);
+
+            Terrain._heightmap_pixel_cache.put(1006301, heightMapEntry);
+
         } catch (IOException e) {
             Logger.error(e);
         }