diff -r 0f31c8ab064b -r b29d60c7cac7 hedgewars/uLandGraphics.pas
--- a/hedgewars/uLandGraphics.pas	Sun Jun 26 20:19:11 2011 -0400
+++ b/hedgewars/uLandGraphics.pas	Sun Jun 26 20:29:08 2011 -0400
@@ -480,10 +480,13 @@
 procedure DrawTunnel(X, Y, dX, dY: hwFloat; ticks, HalfWidth: LongInt);
 var nx, ny, dX8, dY8: hwFloat;
     i, t, tx, ty, stX, stY, ddy, ddx: Longint;
+    despeckle : Boolean;
 begin  // (-dY, dX) is (dX, dY) rotated by PI/2
 stY:= hwRound(Y);
 stX:= hwRound(X);
 
+despeckle:= HalfWidth > 1;
+
 nx:= X + dY * (HalfWidth + 8);
 ny:= Y - dX * (HalfWidth + 8);
 
@@ -505,10 +508,10 @@
        ((Land[ty, tx] and lfObject) <> 0)) then
         begin
         Land[ty, tx]:= Land[ty, tx] or lfDamaged;
-            if (cReducedQuality and rqBlurryLand) = 0 then
+        if despeckle then LandDirty[ty div 32, tx div 32]:= 1;
+        if (cReducedQuality and rqBlurryLand) = 0 then
             LandPixels[ty, tx]:= cExplosionBorderColor
-            else
-            LandPixels[ty div 2, tx div 2]:= cExplosionBorderColor
+        else LandPixels[ty div 2, tx div 2]:= cExplosionBorderColor
         end
     end;
     nx:= nx - dY;
@@ -531,11 +534,10 @@
        ((Land[ty, tx] and lfObject) <> 0)) then
         begin
         Land[ty, tx]:= Land[ty, tx] or lfDamaged;
-            if (cReducedQuality and rqBlurryLand) = 0 then
-        LandPixels[ty, tx]:= cExplosionBorderColor
-            else
-        LandPixels[ty div 2, tx div 2]:= cExplosionBorderColor
-
+        if despeckle then LandDirty[ty div 32, tx div 32]:= 1;
+        if (cReducedQuality and rqBlurryLand) = 0 then
+            LandPixels[ty, tx]:= cExplosionBorderColor
+        else LandPixels[ty div 2, tx div 2]:= cExplosionBorderColor
         end
     end;
     X:= nx;
@@ -575,11 +577,10 @@
        ((Land[ty, tx] and lfObject) <> 0)) then
         begin
         Land[ty, tx]:= Land[ty, tx] or lfDamaged;
+        if despeckle then LandDirty[ty div 32, tx div 32]:= 1;
         if (cReducedQuality and rqBlurryLand) = 0 then
-        LandPixels[ty, tx]:= cExplosionBorderColor
-        else
-        LandPixels[ty div 2, tx div 2]:= cExplosionBorderColor
-
+            LandPixels[ty, tx]:= cExplosionBorderColor
+        else LandPixels[ty div 2, tx div 2]:= cExplosionBorderColor
         end
     end;
     nx:= nx - dY;
@@ -602,10 +603,10 @@
        ((Land[ty, tx] and lfObject) <> 0)) then
         begin
         Land[ty, tx]:= Land[ty, tx] or lfDamaged;
+        if despeckle then LandDirty[ty div 32, tx div 32]:= 1;
         if (cReducedQuality and rqBlurryLand) = 0 then
-        LandPixels[ty, tx]:= cExplosionBorderColor
-        else
-        LandPixels[ty div 2, tx div 2]:= cExplosionBorderColor
+            LandPixels[ty, tx]:= cExplosionBorderColor
+        else LandPixels[ty div 2, tx div 2]:= cExplosionBorderColor
         end
     end;
     nx:= nx - dY;