diff --git a/game/world/terrain/ash.png b/game/world/terrain/ash.png
index 7b6bfea..4a6e5f3 100644
Binary files a/game/world/terrain/ash.png and b/game/world/terrain/ash.png differ
diff --git a/game/world/terrain/swamp.png b/game/world/terrain/swamp.png
index bf2540f..b569e58 100644
Binary files a/game/world/terrain/swamp.png and b/game/world/terrain/swamp.png differ
diff --git a/source/world.adb b/source/world.adb
index 5d52933..db62f7f 100644
--- a/source/world.adb
+++ b/source/world.adb
@@ -167,6 +167,14 @@ package body world is
 			end;
 		end loop;
 		--
+		for x in 0 .. width - 1 loop
+			for y in 0 .. height - 1 loop
+				if map.tiles (x, y) > 17 then
+					map.clips (x, y) := true;
+				end if;
+			end loop;
+		end loop;
+		--
 		for index in 1 .. landmark_limit loop
 			map.landmarks (index).index := core.random (0, landmark_count - 1);
 			map.landmarks (index).state := 0;