diff --git a/polymer/eduke32/source/lunatic/map2text.lua b/polymer/eduke32/source/lunatic/map2text.lua
new file mode 100755
index 000000000..a8e654d22
--- /dev/null
+++ b/polymer/eduke32/source/lunatic/map2text.lua
@@ -0,0 +1,83 @@
+#!/usr/bin/env luajit
+
+local B = require("build")
+local string = require("string")
+
+local fn = arg[1]
+
+if (fn==nil) then
+    print("Usage: map2text <somefile.map>")
+    return 1
+end
+
+local function printf(fmt, ...)
+    print(string.format(fmt, ...))
+end
+
+local map, errmsg = B.loadboard(fn)
+if (map == nil) then
+    printf("Couldn't load \"%s\": %s", fn, errmsg)
+    return 1
+end
+
+
+printf("numsectors = %d", map.numsectors)
+printf("numwalls = %d", map.numwalls)
+printf("numsprites = %d", map.numsprites)
+
+printf("startpos = { %d, %d, %d }", map.start.x, map.start.y, map.start.z)
+printf("startang = %d", map.start.ang)
+printf("startsectnum = %d", map.start.sectnum)
+
+local sector_members = {
+    "wallptr", "wallnum",
+    "ceilingz", "floorz",
+    "ceilingstat", "floorstat",
+    "ceilingpicnum", "ceilingheinum",
+    "ceilingshade",
+    "ceilingpal", "ceilingxpanning", "ceilingypanning",
+    "floorpicnum", "floorheinum",
+    "floorshade",
+    "floorpal", "floorxpanning", "floorypanning",
+    "visibility", "filler",
+    "lotag", "hitag", "extra",
+}
+
+local wall_members = {
+    "x", "y",
+    "point2", "nextwall", "nextsector",
+    "cstat",
+    "picnum", "overpicnum",
+    "shade",
+    "pal", "xrepeat", "yrepeat", "xpanning", "ypanning",
+    "lotag", "hitag", "extra",
+}
+
+local sprite_members = {
+    "x", "y", "z",
+    "cstat", "picnum",
+    "shade",
+    "pal", "clipdist", "filler",
+    "xrepeat", "yrepeat",
+    "xoffset", "yoffset",
+    "sectnum", "statnum",
+    "ang", "owner", "xvel", "yvel", "zvel",
+    "lotag", "hitag", "extra",
+}
+
+local function print_members(map, struct, members)
+    printf("%s = {", struct)
+    for i=0,map["num"..struct.."s"]-1 do
+        printf("[%d]={", i)
+        for j=1,#members do
+            local member = members[j]
+            printf("%s = %d", member, map[struct][i][member])
+        end
+        print("}")
+    end
+    print("}")
+end
+
+print_members(map, "sector", sector_members)
+print_members(map, "wall", wall_members)
+print_members(map, "sprite", sprite_members)
diff --git a/polymer/eduke32/source/lunatic/mapdiff.sh b/polymer/eduke32/source/lunatic/mapdiff.sh
new file mode 100755
index 000000000..0d1df26cf
--- /dev/null
+++ b/polymer/eduke32/source/lunatic/mapdiff.sh
@@ -0,0 +1,27 @@
+#!/bin/sh
+
+DIFF="git diff --no-index --color-words"
+CMD="/usr/bin/env luajit ./map2text.lua"
+
+if [ `uname -s` != "Linux" ]; then
+    # I think 'tempfile' isn't in POSIX. Feel free to use 'mktemp' or something
+    # but absolutely test it before.
+    echo "This helper script is for Linux only."
+    return 1
+fi
+
+if [ -z "$1" -o -z "$2" ]; then
+    echo "Usage: ./mapdiff.sh <file.map> <file2.map>"
+    exit 1
+fi
+
+tf1=`tempfile`
+tf2=`tempfile`
+
+$CMD "$1" > "$tf1"
+$CMD "$2" > "$tf2"
+
+$DIFF "$tf1" "$tf2"
+
+rm "$tf1"
+rm "$tf2"