diff --git a/mapgen.lua b/mapgen.lua
index c4accdc..0be79f8 100644
--- a/mapgen.lua
+++ b/mapgen.lua
@@ -1,13 +1,14 @@
 -- Recreate mod table if we are in a separate environment
 if not minetest.global_exists("mapgen_rivers") then
 	mapgen_rivers = {use_mapgen_thread=true, thread='mapgen'}
+	mapgen_rivers.settings = Settings(minetest.get_worldpath() .. '/mapgen_rivers.conf')
 end
 
 if not mapgen_rivers.grid then
 	dofile(minetest.get_modpath(minetest.get_current_modname()) .. '/load_grid.lua')
 end
 
-local settings = Settings(minetest.get_worldpath() .. '/mapgen_rivers.conf')
+local settings = mapgen_rivers.settings
 
 local sea_level = tonumber(settings:get('sea_level'))
 local elevation_chill = tonumber(settings:get('elevation_chill'))
diff --git a/polygons.lua b/polygons.lua
index 941fca6..a1a7ff9 100644
--- a/polygons.lua
+++ b/polygons.lua
@@ -5,12 +5,14 @@ local function index(x, z)
 	return z*X+x+1
 end
 
-local blocksize = mapgen_rivers.settings.blocksize
-local min_catchment = mapgen_rivers.settings.min_catchment
-local max_catchment = mapgen_rivers.settings.max_catchment
+local settings = mapgen_rivers.settings
+
+local blocksize = tonumber(settings:get('blocksize'))
+local min_catchment = tonumber(settings:get('min_catchment'))
+local max_catchment = tonumber(settings:get('max_catchment'))
 
 local map_offset = {x=0, z=0}
-if mapgen_rivers.settings.center then
+if settings:get_bool('center') then
 	map_offset.x = blocksize*X/2
 	map_offset.z = blocksize*Z/2
 end
@@ -18,8 +20,8 @@ end
 -- Localize for performance
 local floor, ceil, min, max, abs = math.floor, math.ceil, math.min, math.max, math.abs
 
-local min_catchment = mapgen_rivers.settings.min_catchment / (blocksize*blocksize)
-local wpower = mapgen_rivers.settings.river_widening_power
+min_catchment = min_catchment / (blocksize*blocksize)
+local wpower = settings:get('river_widening_power')
 local wfactor = 1/(2*blocksize * min_catchment^wpower)
 local function river_width(flow)
 	flow = abs(flow)
@@ -31,14 +33,14 @@ local function river_width(flow)
 end
 
 local noise_heat -- Need a large-scale noise here so no heat blend
-local elevation_chill = mapgen_rivers.settings.elevation_chill
+local elevation_chill = settings:get_bool('elevation_chill')
 local function get_temperature(x, y, z)
 	local pos = {x=x, y=z}
 	return noise_heat:get2d(pos) - y*elevation_chill
 end
 
-local glaciers = mapgen_rivers.settings.glaciers
-local glacier_factor = mapgen_rivers.settings.glacier_factor
+local glaciers = settings:get_bool('glaciers')
+local glacier_factor = tonumber(settings:get('glacier_factor')
 
 local init = false
 
diff --git a/settings.lua b/settings.lua
index 579cd1a..83a7268 100644
--- a/settings.lua
+++ b/settings.lua
@@ -2,6 +2,7 @@ local mtsettings = minetest.settings
 local mgrsettings = Settings(minetest.get_worldpath() .. '/mapgen_rivers.conf')
 
 mapgen_rivers.version = "1.0.2"
+mapgen_rivers.settings = settings
 
 local previous_version_mt = mtsettings:get("mapgen_rivers_version") or "0.0"
 local previous_version_mgr = mgrsettings:get("version") or "0.0"