diff --git a/src/engine/InterestManagement/HeightMap.java b/src/engine/InterestManagement/HeightMap.java
index 77b12f8b..12e28ac1 100644
--- a/src/engine/InterestManagement/HeightMap.java
+++ b/src/engine/InterestManagement/HeightMap.java
@@ -103,7 +103,7 @@ public class HeightMap {
 
         // Generate pixel array from image data
 
-        generatePixelData();
+        generatePixelData(this);
 
         HeightMap.heightmapByLoadNum.put(this.zoneLoadID, this);
 
@@ -423,19 +423,19 @@ public class HeightMap {
         return interpolatedHeight;
     }
 
-    private void generatePixelData() {
+    private static void generatePixelData(HeightMap heightMap) {
 
         Color color;
 
         // Generate altitude lookup table for this heightmap
 
-        this.pixelColorValues = new int[this.heightmapImage.getWidth()][this.heightmapImage.getHeight()];
+        heightMap.pixelColorValues = new int[heightMap.heightmapImage.getWidth()][heightMap.heightmapImage.getHeight()];
 
-        for (int y = 0; y < this.heightmapImage.getHeight(); y++) {
-            for (int x = 0; x < this.heightmapImage.getWidth(); x++) {
+        for (int y = 0; y < heightMap.heightmapImage.getHeight(); y++) {
+            for (int x = 0; x < heightMap.heightmapImage.getWidth(); x++) {
 
-                color = new Color(this.heightmapImage.getRGB(x, y));
-                pixelColorValues[x][y] = color.getRed();
+                color = new Color(heightMap.heightmapImage.getRGB(x, y));
+                heightMap.pixelColorValues[x][y] = color.getRed();
             }
         }