diff --git a/settings.py b/settings.py
index d5342ab..c63b015 100644
--- a/settings.py
+++ b/settings.py
@@ -1,6 +1,11 @@
+import os.path
+
 def read_config_file(fname):
     settings = {}
 
+    if not os.path.isfile(fname):
+        return settings
+
     with open(fname, 'r') as f:
         for line in f:
             slist = line.split('=', 1)
diff --git a/terrain_default.conf b/terrain.conf
similarity index 89%
rename from terrain_default.conf
rename to terrain.conf
index 7f71758..1d556f5 100644
--- a/terrain_default.conf
+++ b/terrain.conf
@@ -9,6 +9,7 @@ K = 1
 m = 0.35
 d = 0.8
 sea_level = 0
+flex_radius = 20
 
 time = 10
 niter = 10
diff --git a/terrain_higher.conf b/terrain_higher.conf
new file mode 100644
index 0000000..7914988
--- /dev/null
+++ b/terrain_higher.conf
@@ -0,0 +1,15 @@
+mapsize = 1000
+scale = 400
+vscale = 500
+offset = 0
+persistence = 0.65
+lacunarity = 2.0
+
+K = 0.5
+m = 0.5
+d = 0.1
+sea_level = 0
+flex_radius = 100
+
+time = 10
+niter = 10
diff --git a/terrain_rivers.py b/terrain_rivers.py
index 0a64205..4300945 100755
--- a/terrain_rivers.py
+++ b/terrain_rivers.py
@@ -15,29 +15,28 @@ import view_map
 os.chdir(os.path.dirname(sys.argv[0]))
 argc = len(sys.argv)
 
-params = {}
+config_file = 'terrain.conf'
 
 if argc > 1:
-	if os.path.isfile(sys.argv[1]):
-		params = settings.read_config_file(sys.argv[1])
-	else:
-		mapsize = int(sys.argv[1])
+    config_file = sys.argv[1]
+
+params = settings.read_config_file(config_file)
 
 def get_setting(name, default):
 	if name in params:
 		return params[name]
 	return default
 
-mapsize = int(get_setting('mapsize', 400))
-scale = float(get_setting('scale', 200.0))
-vscale = float(get_setting('vscale', 200.0))
+mapsize = int(get_setting('mapsize', 1000))
+scale = float(get_setting('scale', 400.0))
+vscale = float(get_setting('vscale', 300.0))
 offset = float(get_setting('offset', 0.0))
-persistence = float(get_setting('persistence', 0.5))
+persistence = float(get_setting('persistence', 0.6))
 lacunarity = float(get_setting('lacunarity', 2.0))
 
 K = float(get_setting('K', 1.0))
 m = float(get_setting('m', 0.35))
-d = float(get_setting('d', 1.0))
+d = float(get_setting('d', 0.8))
 sea_level = float(get_setting('sea_level', 0.0))
 flex_radius = float(get_setting('flex_radius', 20.0))