diff --git a/data/json/mapgen/shelter.json b/data/json/mapgen/shelter.json
index 0b08c5b589a9f..116940490a72f 100644
--- a/data/json/mapgen/shelter.json
+++ b/data/json/mapgen/shelter.json
@@ -126,13 +126,13 @@
         "    :.bbbbb.....c..:    ",
         "    #...........cc.#    ",
         "    #.bbbbb........#    ",
-        "    #.......l|||...#    ",
-        "    #.|||||.l|*=...#    ",
-        "    :.......l|||...:    ",
-        "    #.b.b.b...c||+|#    ",
-        "    #.b.b.b...c|..l#    ",
-        "    #.b.b.b...c|>.l#    ",
-        "    #..........|>.l#4   ",
+        "    #.......l###...#    ",
+        "    #.#####.l#*=...#    ",
+        "    :.......l###...:    ",
+        "    #.b.b.b...c##+##    ",
+        "    #.b.b.b...c#..l#    ",
+        "    #.b.b.b...c#>.l#    ",
+        "    #..........#>.l#4   ",
         "    #####:##+#:#####    "
       ],
       "palettes": [ "shelter" ],
@@ -190,16 +190,16 @@
         "    &&&&&&&&&&&&&&&&    ",
         "           ##:#++#:##   ",
         "   #########%......l#   ",
-        "   #*|cccc6........l#   ",
+        "   #*#cccc6........l#   ",
         "   #.=.............l#   ",
-        "  ##||.............###  ",
+        "  ####.............###  ",
         "  #b.....bbbbb...b..b#  ",
         "  :b..b..........b..b:  ",
         "  #b..b...llll...b..b#  ",
-        "  #b..b...||||...b..b#  ",
+        "  #b..b...####...b..b#  ",
         "  #b..b....>>....b..b#  ",
         "  #b..b....>>....b..b#  ",
-        "  :b..b...||||...b..b:  ",
+        "  :b..b...####...b..b:  ",
         "  #b..b...llll...b..b#  ",
         "  #b..b..........b..b#  ",
         "  ###.....bbbb.....###  ",
@@ -306,13 +306,13 @@
         "    :.bbbbb.....c..:    ",
         "    #...........cc.#    ",
         "    #.bbbbb........#    ",
-        "    #.......l|||...#    ",
-        "    #.|||||.l|*=...#    ",
-        "    :.......l|||...:    ",
-        "    #.b.b.b...c||+|#    ",
-        "    #.b.b.b...c|..l#    ",
-        "    #.b.b.b...c|>.l#    ",
-        "    #..........|>.l#4   ",
+        "    #.......l###...#    ",
+        "    #.#####.l#*=...#    ",
+        "    :.......l###...:    ",
+        "    #.b.b.b...c##+##    ",
+        "    #.b.b.b...c#..l#    ",
+        "    #.b.b.b...c#>.l#    ",
+        "    #..........#>.l#4   ",
         "    #####:##+#:#####    "
       ],
       "palettes": [ { "distribution": [ [ "shelter_used", 10 ], [ "shelter_vandal", 10 ] ] } ],
@@ -340,10 +340,10 @@
         "  #b.....bbbbb...b..b#  ",
         "  :b..b..........b..b:  ",
         "  #b..b...llll...b..b#  ",
-        "  #b..b...||||...b..b#  ",
+        "  #b..b...####...b..b#  ",
         "  #b..b....>>....b..b#  ",
         "  #b..b....>>....b..b#  ",
-        "  :b..b...||||...b..b:  ",
+        "  :b..b...####...b..b:  ",
         "  #b..b...llll...b..b#  ",
         "  #b..b..........b..b#  ",
         "  ###.....bbbb.....###  ",
@@ -383,7 +383,7 @@
         "    :b............b:    ",
         "    #b.........c..b#    ",
         "    #..........c...#    ",
-        "    #||..b.....c...#    ",
+        "    ###..b.....c...#    ",
         "    #*=.bbb..bbc..6#    ",
         "    #####:##+#:#####4   "
       ],
@@ -414,13 +414,13 @@
         "    :bb.........c@.:    ",
         "    #b..........cc.#    ",
         "    #.bbbb.........#    ",
-        "    #.......l|||...#    ",
-        "    #b|||||.l|*=..b#    ",
-        "    :bb.....l|||..b:    ",
-        "    #b........c||+|#    ",
-        "    #.........c|..l#    ",
-        "    #....b....c|>.l#    ",
-        "    #...bbb..bb|>.l#4   ",
+        "    #.......l###...#    ",
+        "    #b#####.l#*=..b#    ",
+        "    :bb.....l###..b:    ",
+        "    #b........c##+##    ",
+        "    #.........c#..l#    ",
+        "    #....b....c#>.l#    ",
+        "    #...bbb..bb#>.l#4   ",
         "    #####:##+#:#####    "
       ],
       "palettes": [ "shelter_survivor" ],
@@ -442,16 +442,16 @@
         "    &&&&&&&&&&&&&&&&    ",
         "           ##:#++#:##   ",
         "   #########%......l#   ",
-        "   #*|cccc6........l#   ",
+        "   #*#cccc6........l#   ",
         "   #.=.............l#   ",
-        "  ##||.............###  ",
+        "  ####.............###  ",
         "  #bb....bbbbb.....bb#  ",
         "  :bb..............bb:  ",
         "  #bb.....llll.....bb#  ",
-        "  #b......||||...b..b#  ",
+        "  #b......####...b..b#  ",
         "  #b..b....>>.@..b..b#  ",
         "  #bb......>>......bb#  ",
-        "  :bb.....||||.....bb:  ",
+        "  :bb.....####.....bb:  ",
         "  #bb.....llll.....bb#  ",
         "  #b..b..........b..b#  ",
         "  ###..............###  ",
@@ -603,7 +603,7 @@
         "    :.b.b.b........:    ",
         "    #.b.b.b....c...#    ",
         "    #.b.b.b....c.7.#    ",
-        "    #||8b.b....c...#    ",
+        "    ###8b.b....c...#    ",
         "    #*=........c..6#    ",
         "    #####:##+#:#####4   "
       ],
@@ -636,13 +636,13 @@
         "    :.bbbbb.....c..:    ",
         "    #...........cc.#    ",
         "    #.bbbbb........#    ",
-        "    #.......l|||...#    ",
-        "    #.|||||.l|*=...:    ",
-        "    :.......l|||..8#    ",
-        "    #.b.b.b...c||+##    ",
-        "    #.b7b.b...c|..l#    ",
-        "    #.b.b.b...c|>.l#    ",
-        "    #..........|>.l#4   ",
+        "    #.......l###...#    ",
+        "    #.#####.l#*=...:    ",
+        "    :.......l###..8#    ",
+        "    #.b.b.b...c##+##    ",
+        "    #.b7b.b...c#..l#    ",
+        "    #.b.b.b...c#>.l#    ",
+        "    #..........#>.l#4   ",
         "    #####:##+#:#####    "
       ],
       "palettes": [ "shelter_infested" ],
@@ -666,16 +666,16 @@
         "    &&&&&&&&&&&&&&&&    ",
         "           ##:#++#:##   ",
         "   #########%......l#   ",
-        "   #*|cccc6.....7..l#   ",
+        "   #*#cccc6.....7..l#   ",
         "   #.=.............l#   ",
-        "  ##||.............###  ",
+        "  ####.............###  ",
         "  #b.....bbbbb...b..b#  ",
         "  :b..b..........b..b:  ",
         "  #b..b...llll...b..b#  ",
-        "  #b..b...||||...b..b#  ",
+        "  #b..b...####...b..b#  ",
         "  #b..b....>>....b..b#  ",
         "  #b..b....>>....b..b#  ",
-        "  :b..b...||||...b..b:  ",
+        "  :b..b...####...b..b:  ",
         "  #b..b...llll...b.8b#  ",
         "  #b..b..........b..b#  ",
         "  ###.....bbbb.....###  ",