diff --git a/src/World.moon b/src/World.moon
index d6a6ac9..19f71e4 100644
--- a/src/World.moon
+++ b/src/World.moon
@@ -1,6 +1,6 @@
 import random, noise from love.math
 
-biomes = love.image.newImageData "biomes3.png"
+biomes = love.image.newImageData "biomes4.png"
 
 class World
   new: =>
@@ -16,6 +16,16 @@ class World
       t = @temperature(x, y)
       t = math.sqrt(t * (1 - h)) -- correct temperature according to altitude
 
+      if h < 1/3
+        map[x][y] = { 0, 0, 1 }
+      else
+        -- x is precipitation (0 to 599)
+        -- y is temperature (0 to 599)
+        t = math.min 599, math.floor t * 600
+        p = math.min 599, math.floor p * 600
+        map[x][y] = { biomes\getPixel p, t }
+      if true return map[x][y]
+
       colors = {
         ocean: { 0, 0, 1, 1 }
         "fresh water": { 1/3, 1/3, 1, 1 }
@@ -38,7 +48,7 @@ class World
       for biome, color in pairs colors
         table.insert color, biome
 
-      biomes = {
+      biomes_old = {
         -- "frozen desert": { 1/3, 0.75, 0.76, 1, h: 0.5, p: 0.12, t: 0 }
         -- swamp: { 65/255, 104/255, 37/255, 1, h: 0.1, p: 1, t: 0.8 }
         -- -- savanna: { }
@@ -63,7 +73,7 @@ class World
         dt = t - b.t
         return dh^2 + dp^2 + dt^2
       choices = {}
-      for name, value in pairs biomes
+      for name, value in pairs biomes_old
         table.insert choices, { d2(h, p, t, value), name, value }
       table.sort choices, (A, B) -> return A[1] < B[1]
       copy = (t) ->
@@ -75,10 +85,10 @@ class World
         r = math.sqrt A[1]^2 + B[1]^2
         g = math.sqrt A[2]^2 + B[2]^2
         b = math.sqrt A[3]^2 + B[3]^2
-        a = math.sqrt (A[4] or 1)^2 + ((B[4] or 1)^2
+        a = math.sqrt (A[4] or 1)^2 + (B[4] or 1)^2
         return { r, g, b, a or 1 }
-      map[x][y] = merge choices[1][3], choices[2][3], choices[1][1] - choices[2][1]
-      map[x][y][5] = "#{choices[1][2]}: #{tostring(h)\sub 1, 4}, #{tostring(p)\sub 1, 4}, #{tostring(t)\sub 1, 4}"
+      -- map[x][y] = merge choices[1][3], choices[2][3], choices[1][1] - choices[2][1]
+      -- map[x][y][5] = "#{choices[1][2]}: #{tostring(h)\sub 1, 4}, #{tostring(p)\sub 1, 4}, #{tostring(t)\sub 1, 4}"
 
       -- t = math.min 9, math.floor t * 10
       -- p = math.min 9, math.floor p * 10
diff --git a/src/biomes4.png b/src/biomes4.png
new file mode 100644
index 0000000..dacb381
Binary files /dev/null and b/src/biomes4.png differ
diff --git a/src/main.moon b/src/main.moon
index 655ef04..bdfad92 100644
--- a/src/main.moon
+++ b/src/main.moon
@@ -3,6 +3,9 @@ import tileSize from require "constants"
 w, h = love.graphics.getDimensions!
 screen = { w: math.floor(w/tileSize), h: math.floor(h/tileSize)}
 
+debug = false
+map = true
+
 Player = require "Player"
 player = Player!
 
@@ -31,13 +34,28 @@ love.draw = ->
       screenY += 1
     screenY = 0
     screenX += 1
-  love.graphics.setColor 1, 0, 0, 1
-  love.graphics.circle "line", w/2, h/2, 5
-  t = world\get player\tile!
-  love.graphics.setColor 0, 0, 0, 1
-  love.graphics.rectangle "fill", 0, 0, w, 16
-  love.graphics.setColor 1, 1, 1, 1
-  love.graphics.print t[5] or "", 1, 1
+  if debug
+    love.graphics.setColor 1, 0, 0, 1
+    love.graphics.circle "line", w/2, h/2, 5
+    t = world\get player\tile!
+    love.graphics.setColor 0, 0, 0, 1
+    love.graphics.rectangle "fill", 0, 0, w, 16
+    love.graphics.setColor 1, 1, 1, 1
+    love.graphics.print t[5] or "", 1, 1
+  if map
+    mapResolution = 14
+    x, y = player\tile!
+    screenX, screenY = 0, 0
+    for x = x - 50 * mapResolution, x + 49 * mapResolution, mapResolution
+      for y = y - 50 * mapResolution, y + 49 * mapResolution, mapResolution
+        if tile = world\get x, y
+          love.graphics.setColor tile
+        else
+          love.graphics.setColor 0, 0, 0, 1
+        love.graphics.points screenX, screenY
+        screenY += 1
+      screenY = 0
+      screenX += 1
 
 love.keypressed = (key) ->
   love.event.quit! if key == "escape"