diff --git a/map_formspec.lua b/map_formspec.lua
index 118856f..e5bdd57 100644
--- a/map_formspec.lua
+++ b/map_formspec.lua
@@ -52,41 +52,39 @@ local function generate_map(data, x, y, w, h, player_x, player_y, detail, map_sc
                 local name = minetest.get_biome_name(column[j * map_scale].biome);
                 local height = column[j * map_scale].height;
                 local biome = cartographer.get_biome_texture(name, math.floor(height + 0.5), detail);
-                local depth = math.min(math.max(math.floor(height / 8), -8), 0) * -1
-                height = math.max(math.min(math.floor(height / 4), 8), 0)
 
-                local mod = "";
-                if height > 0 then
-                    mod = "^[colorize:white:"..tostring(height * 10)
-                elseif depth > 0 then
-                    mod = "^[colorize:#1f1f34:"..tostring(depth * 10)
-                end
+                if biome then
+                    local depth = math.min(math.max(math.floor(height / 8), -8), 0) * -1
+                    height = math.max(math.min(math.floor(height / 4), 8), 0)
 
-                if biome == nil then
-                    str = str .. unknown_biome_tile(fx, fy, scale, get_variant(random));
-                else
+                    local mod = "";
                     if height > 0 then
-                        str = str..tile:format(fx, fy - (height * 0.05) + scale - 0.01,
-                                            scale, (height * 0.05) + 0.01,
-                                            cartographer.skin.cliff_texture .. ".png");
+                        mod = "^[colorize:white:"..tostring(height * 10)
+                        height = height * 0.05;
+
+                        str = str..tile:format(fx, fy - height + (scale - 0.01), scale, height + 0.01, cartographer.skin.cliff_texture .. ".png");
+                    elseif depth > 0 then
+                        mod = "^[colorize:#1f1f34:"..tostring(depth * 10)
                     end
 
-                    str = str..tile:format(fx, fy - (height * 0.05), scale, scale, biome .. "." .. tostring(get_variant(random)) .. ".png" .. mod)
-                end
+                    str = str..tile:format(fx, fy - height, scale, scale, biome .. "." .. tostring(get_variant(random)) .. ".png" .. mod)
 
-                if get_marker then
-                    local marker = cartographer.get_marker_texture(get_marker(user, i, j), detail);
-                    if marker then
-                        str = str..tile:format(fx, fy - (height * 0.05), scale, scale, marker .. ".png")
+                    if get_marker then
+                        local marker = cartographer.get_marker_texture(get_marker(user, i, j), detail);
+                        if marker then
+                            str = str..tile:format(fx, fy - height, scale, scale, marker .. ".png")
+                        end
                     end
-                end
 
-                if i == player_x and j == player_y then
-                    str = str..marker:format(fx, fy - (height * 0.05),
-                                            scale, scale,
-                                            cartographer.skin.player_icon.texture .. ".png",
-                                            cartographer.skin.player_icon.frame_count,
-                                            cartographer.skin.player_icon.frame_duration);
+                    if i == player_x and j == player_y then
+                        str = str..marker:format(fx, fy - height,
+                                                 scale, scale,
+                                                 cartographer.skin.player_icon.texture .. ".png",
+                                                 cartographer.skin.player_icon.frame_count,
+                                                 cartographer.skin.player_icon.frame_duration);
+                    end
+                else
+                    str = str .. unknown_biome_tile(fx, fy, scale, get_variant(random));
                 end
             end
         end