diff --git a/BauSystem_Main/src/de/steamwar/bausystem/region/Region.java b/BauSystem_Main/src/de/steamwar/bausystem/region/Region.java
index 727af8f2..29eecaa1 100644
--- a/BauSystem_Main/src/de/steamwar/bausystem/region/Region.java
+++ b/BauSystem_Main/src/de/steamwar/bausystem/region/Region.java
@@ -140,22 +140,22 @@ public class Region {
         this.prototype = prototype;
 
         this.minPoint = point;
-        this.maxPoint = point.add(prototype.getSizeX(), prototype.getSizeY(), prototype.getSizeZ());
+        this.maxPoint = point.add(prototype.getSizeX() - 1, prototype.getSizeY() - 1, prototype.getSizeZ() - 1);
 
         if (prototype.getTestblock() != null) {
             this.minPointTestblock = point.add(prototype.getTestblock().getOffsetX(), prototype.getTestblock().getOffsetY(), prototype.getTestblock().getOffsetZ());
-            this.maxPointTestblock = this.minPointTestblock.add(prototype.getTestblock().getSizeX(), prototype.getTestblock().getSizeY(), prototype.getTestblock().getSizeZ());
+            this.maxPointTestblock = this.minPointTestblock.add(prototype.getTestblock().getSizeX() - 1, prototype.getTestblock().getSizeY() - 1, prototype.getTestblock().getSizeZ() - 1);
 
             this.minPointTestblockExtension = this.minPointTestblock.substract(prototype.getTestblock().getExtensionNegativeX(), prototype.getTestblock().getExtensionNegativeY(), prototype.getTestblock().getExtensionNegativeZ());
-            this.maxPointTestblockExtension = this.maxPointTestblock.add(prototype.getTestblock().getExtensionPositiveX(), prototype.getTestblock().getExtensionPositiveY(), prototype.getTestblock().getExtensionPositiveZ());
+            this.maxPointTestblockExtension = this.maxPointTestblock.add(prototype.getTestblock().getExtensionPositiveX() - 1, prototype.getTestblock().getExtensionPositiveY() - 1, prototype.getTestblock().getExtensionPositiveZ() - 1);
         }
 
         if (prototype.getBuild() != null) {
             this.minPointBuild = point.add(prototype.getBuild().getOffsetX(), prototype.getBuild().getOffsetY(), prototype.getBuild().getOffsetZ());
-            this.maxPointBuild = this.minPointBuild.add(prototype.getBuild().getSizeX(), prototype.getBuild().getSizeY(), prototype.getBuild().getSizeZ());
+            this.maxPointBuild = this.minPointBuild.add(prototype.getBuild().getSizeX() - 1, prototype.getBuild().getSizeY() - 1, prototype.getBuild().getSizeZ() - 1);
 
             this.minPointBuildExtension = this.minPointBuild.substract(prototype.getBuild().getExtensionNegativeX(), prototype.getBuild().getExtensionNegativeY(), prototype.getBuild().getExtensionNegativeZ());
-            this.maxPointBuildExtension = this.maxPointBuild.add(prototype.getBuild().getExtensionPositiveX(), prototype.getBuild().getExtensionPositiveY(), prototype.getBuild().getExtensionPositiveZ());
+            this.maxPointBuildExtension = this.maxPointBuild.add(prototype.getBuild().getExtensionPositiveX() - 1, prototype.getBuild().getExtensionPositiveY() - 1, prototype.getBuild().getExtensionPositiveZ() - 1);
         }
 
         if (prototype.getFloorOffset() != 0) {