diff --git a/src/de/steamwar/lobby/map/CustomMap.java b/src/de/steamwar/lobby/map/CustomMap.java
index e9003d5..aadd9ae 100644
--- a/src/de/steamwar/lobby/map/CustomMap.java
+++ b/src/de/steamwar/lobby/map/CustomMap.java
@@ -43,6 +43,10 @@ public class CustomMap {
             throw new IllegalArgumentException("Image height must be a multiple of 128");
         }
 
+        final double multiplier1 = 7 / 16.0;
+        final double multiplier2 = 3 / 16.0;
+        final double multiplier3 = 5 / 16.0;
+        final double multiplier4 = 1 / 16.0;
         WritableRaster raster = image.getRaster();
         int numBands = raster.getNumBands();
         int[] pixels = raster.getPixels(0, 0, image.getWidth(), image.getHeight(), new int[image.getWidth() * image.getHeight() * numBands]);
@@ -60,23 +64,23 @@ public class CustomMap {
                 int quantErrorGreen = green - nearest.getGreen();
                 int quantErrorBlue = blue - nearest.getBlue();
                 if (x < image.getWidth() - 1) {
-                    pixels[(y * image.getWidth() + x + 1) * numBands] = clamp(pixels[(y * image.getWidth() + x + 1) * numBands] + quantErrorRed * 7 / 16);
-                    pixels[(y * image.getWidth() + x + 1) * numBands + 1] = clamp(pixels[(y * image.getWidth() + x + 1) * numBands + 1] + quantErrorGreen * 7 / 16);
-                    pixels[(y * image.getWidth() + x + 1) * numBands + 2] = clamp(pixels[(y * image.getWidth() + x + 1) * numBands + 2] + quantErrorBlue * 7 / 16);
+                    pixels[(y * image.getWidth() + x + 1) * numBands] = clamp((int) (pixels[(y * image.getWidth() + x + 1) * numBands] + quantErrorRed * multiplier1));
+                    pixels[(y * image.getWidth() + x + 1) * numBands + 1] = clamp((int) (pixels[(y * image.getWidth() + x + 1) * numBands + 1] + quantErrorGreen * multiplier1));
+                    pixels[(y * image.getWidth() + x + 1) * numBands + 2] = clamp((int) (pixels[(y * image.getWidth() + x + 1) * numBands + 2] + quantErrorBlue * multiplier1));
                 }
                 if (x > 0) {
-                    pixels[(y * image.getWidth() + x - 1) * numBands] = clamp(pixels[(y * image.getWidth() + x - 1) * numBands] + quantErrorRed * 3 / 16);
-                    pixels[(y * image.getWidth() + x - 1) * numBands + 1] = clamp(pixels[(y * image.getWidth() + x - 1) * numBands + 1] + quantErrorGreen * 3 / 16);
-                    pixels[(y * image.getWidth() + x - 1) * numBands + 2] = clamp(pixels[(y * image.getWidth() + x - 1) * numBands + 2] + quantErrorBlue * 3 / 16);
+                    pixels[(y * image.getWidth() + x - 1) * numBands] = clamp((int) (pixels[(y * image.getWidth() + x - 1) * numBands] + quantErrorRed * multiplier2));
+                    pixels[(y * image.getWidth() + x - 1) * numBands + 1] = clamp((int) (pixels[(y * image.getWidth() + x - 1) * numBands + 1] + quantErrorGreen * multiplier2));
+                    pixels[(y * image.getWidth() + x - 1) * numBands + 2] = clamp((int) (pixels[(y * image.getWidth() + x - 1) * numBands + 2] + quantErrorBlue * multiplier2));
                 }
                 if (y < image.getHeight() - 1) {
-                    pixels[((y + 1) * image.getWidth() + x) * numBands] = clamp(pixels[((y + 1) * image.getWidth() + x) * numBands] + quantErrorRed * 5 / 16);
-                    pixels[((y + 1) * image.getWidth() + x) * numBands + 1] = clamp(pixels[((y + 1) * image.getWidth() + x) * numBands + 1] + quantErrorGreen * 5 / 16);
-                    pixels[((y + 1) * image.getWidth() + x) * numBands + 2] = clamp(pixels[((y + 1) * image.getWidth() + x) * numBands + 2] + quantErrorBlue * 5 / 16);
+                    pixels[((y + 1) * image.getWidth() + x) * numBands] = clamp((int) (pixels[((y + 1) * image.getWidth() + x) * numBands] + quantErrorRed * multiplier3));
+                    pixels[((y + 1) * image.getWidth() + x) * numBands + 1] = clamp((int) (pixels[((y + 1) * image.getWidth() + x) * numBands + 1] + quantErrorGreen * multiplier3));
+                    pixels[((y + 1) * image.getWidth() + x) * numBands + 2] = clamp((int) (pixels[((y + 1) * image.getWidth() + x) * numBands + 2] + quantErrorBlue * multiplier3));
                     if (x < image.getWidth() - 1) {
-                        pixels[((y + 1) * image.getWidth() + x + 1) * numBands] = clamp(pixels[((y + 1) * image.getWidth() + x + 1) * numBands] + quantErrorRed / 16);
-                        pixels[((y + 1) * image.getWidth() + x + 1) * numBands + 1] = clamp(pixels[((y + 1) * image.getWidth() + x + 1) * numBands + 1] + quantErrorGreen / 16);
-                        pixels[((y + 1) * image.getWidth() + x + 1) * numBands + 2] = clamp(pixels[((y + 1) * image.getWidth() + x + 1) * numBands + 2] + quantErrorBlue / 16);
+                        pixels[((y + 1) * image.getWidth() + x + 1) * numBands] = clamp((int) (pixels[((y + 1) * image.getWidth() + x + 1) * numBands] + quantErrorRed * multiplier4));
+                        pixels[((y + 1) * image.getWidth() + x + 1) * numBands + 1] = clamp((int) (pixels[((y + 1) * image.getWidth() + x + 1) * numBands + 1] + quantErrorGreen * multiplier4));
+                        pixels[((y + 1) * image.getWidth() + x + 1) * numBands + 2] = clamp((int) (pixels[((y + 1) * image.getWidth() + x + 1) * numBands + 2] + quantErrorBlue * multiplier4));
                     }
                 }
             }