diff --git a/biome_api.lua b/biome_api.lua
index ef2697f..739f877 100644
--- a/biome_api.lua
+++ b/biome_api.lua
@@ -1,3 +1,5 @@
+local util = ...;
+
 local biome_lookup = {};
 
 return {
@@ -27,7 +29,7 @@ return {
             local matches_height = (not biome.min_height or height >= biome.min_height)
             and (not biome.max_height or height <= biome.max_height);
             if biome.name == name and matches_height then
-                return cartographer.detail_texture(biome.textures, detail);
+                return util.get_clamped(biome.textures, detail);
             end
         end
 
diff --git a/init.lua b/init.lua
index c532b55..76a0b48 100644
--- a/init.lua
+++ b/init.lua
@@ -49,13 +49,14 @@ local marker_lookup = {};
 local skin = loadfile(modpath .. "/skin_api.lua") ();
 local gui = loadfile(modpath .. "/formspec.lua") ();
 local audio = loadfile(modpath .. "/audio.lua") ();
+local util = loadfile(modpath .. "/util.lua") ();
 
-local biomes = loadfile(modpath .. "/biome_api.lua") ();
+local biomes = loadfile(modpath .. "/biome_api.lua") (util);
 
 local scanner = loadfile(modpath .. "/scanner.lua") (map_data, chunk);
 local maps = loadfile(modpath .. "/map_api.lua") (map_data, chunk, scanner);
 local markers = loadfile(modpath .. "/marker_api.lua") (marker_lookup);
-local map_formspec = loadfile(modpath .. "/map_formspec.lua") (map_data, gui, skin, biomes, markers);
+local map_formspec = loadfile(modpath .. "/map_formspec.lua") (map_data, gui, skin, util, biomes, markers);
 local map_item = loadfile(modpath .. "/items.lua") (chunk, marker_lookup, gui, skin, audio, maps, map_formspec);
 loadfile(modpath .. "/commands.lua") (chunk, audio, map_formspec);
 loadfile(modpath .. "/table.lua") (gui, skin, audio, maps, map_item);
diff --git a/map_api.lua b/map_api.lua
index 59401a1..b45f69f 100644
--- a/map_api.lua
+++ b/map_api.lua
@@ -144,13 +144,4 @@ local function fill_loop()
 end
 minetest.after(5, fill_loop);
 
--- Get an entry from a list for a given detail level
--- textures: An array of textures
--- detail: The detail level
---
--- Returns the entry at detail, or the last entry if detail is out-of-bounds
-function cartographer.detail_texture(textures, detail)
-    return textures[math.min(detail, #textures)];
-end
-
 return maps;
diff --git a/map_formspec.lua b/map_formspec.lua
index c4c2053..b8b2ccf 100644
--- a/map_formspec.lua
+++ b/map_formspec.lua
@@ -1,6 +1,6 @@
 -- Arguments
 -- map_data: The cartographer map data table
-local map_data, gui, skin, biomes, markers = ...;
+local map_data, gui, skin, util, biomes, markers = ...;
 
 -- Constants
 local TILE_SIZE = 0.25;
@@ -63,7 +63,7 @@ local function generate_map(x, y, w, h, player_x, player_y, detail, map_scale, h
         for j = y + h,y,-1 do
             local fy = (y + h - j) * TILE_OFFSET;
             if column == nil or column[j * map_scale] == nil or (is_visible and not is_visible(..., i, j)) then
-                local unknown_tex = cartographer.detail_texture(skin.unknown_biome_textures, detail);
+                local unknown_tex = util.get_clamped(skin.unknown_biome_textures, detail);
                 str = str .. gui.image {
                     x = fx,
                     y = fy,
@@ -93,7 +93,7 @@ local function generate_map(x, y, w, h, player_x, player_y, detail, map_scale, h
                                 w = TILE_SIZE,
                                 h = height + 0.01,
 
-                                image = cartographer.detail_texture(skin.cliff_textures, detail)  .. ".png",
+                                image = util.get_clamped(skin.cliff_textures, detail)  .. ".png",
                             };
                         else
                             height = 0;
@@ -126,7 +126,7 @@ local function generate_map(x, y, w, h, player_x, player_y, detail, map_scale, h
                     end
 
                     if i == player_x and j == player_y then
-                        local player_icon = cartographer.detail_texture(skin.player_icons, detail);
+                        local player_icon = util.get_clamped(skin.player_icons, detail);
                         str = str .. gui.animated_image {
                             x = fx,
                             y = fy - height,
@@ -137,7 +137,7 @@ local function generate_map(x, y, w, h, player_x, player_y, detail, map_scale, h
                         };
                     end
                 else
-                    local unknown_tex = cartographer.detail_texture(skin.unknown_biome_textures, detail);
+                    local unknown_tex = util.get_clamped(skin.unknown_biome_textures, detail);
                     str = str .. gui.image {
                         x = fx,
                         y = fy,
diff --git a/util.lua b/util.lua
new file mode 100644
index 0000000..c760a07
--- /dev/null
+++ b/util.lua
@@ -0,0 +1,10 @@
+return {
+    -- Get an entry from a list for a given detail level
+    -- textures: An array of textures
+    -- detail: The detail level
+    --
+    -- Returns the entry at detail, or the last entry if detail is out-of-bounds
+    get_clamped = function(textures, detail)
+        return textures[math.min(detail, #textures)];
+    end
+};