+# First of 2 3D noises that together define tunnels.
+# type: noise_params
+# mgfractal_np_cave1 = 0, 12, (61, 61, 61), 52534, 3, 0.5, 2.0
+
+# Second of 2 3D noises that together define tunnels.
+# type: noise_params
+# mgfractal_np_cave2 = 0, 12, (67, 67, 67), 10325, 3, 0.5, 2.0
+
+#### Mapgen Valleys
+
+##### General
+
+# Map generation attributes specific to Mapgen Valleys.
+# 'altitude_chill' makes higher elevations colder, which may cause biome issues.
+# 'humid_rivers' modifies the humidity around rivers and in areas where water would tend to pool,
+# it may interfere with delicately adjusted biomes.
+# Flags that are not specified in the flag string are not modified from the default.
+# Flags starting with 'no' are used to explicitly disable them.
+# type: flags possible values: altitude_chill, noaltitude_chill, humid_rivers, nohumid_rivers
+# mg_valleys_spflags = altitude_chill,humid_rivers
+
+# The altitude at which temperature drops by 20C
+# type: int
+# mgvalleys_altitude_chill = 90
+
+# Depth below which you'll find large caves.
+# type: int
+# mgvalleys_large_cave_depth = -33
+
+# Creates unpredictable lava features in caves.
+# These can make mining difficult. Zero disables them. (0-10)
+# type: int
+# mgvalleys_lava_features = 0
+
+# Depth below which you'll find massive caves.
+# type: int
+# mgvalleys_massive_cave_depth = -256
+
+# How deep to make rivers
+# type: int
+# mgvalleys_river_depth = 4
+
+# How wide to make rivers
+# type: int
+# mgvalleys_river_size = 5
+
+# Creates unpredictable water features in caves.
+# These can make mining difficult. Zero disables them. (0-10)
+# type: int
+# mgvalleys_water_features = 0
+
+# Controls width of tunnels, a smaller value creates wider tunnels.
+# type: float
+# mgvalleys_cave_width = 0.09
+
+##### Noises
+
+# Caves and tunnels form at the intersection of the two noises
+# type: noise_params
+# mgvalleys_np_cave1 = 0, 12, (61, 61, 61), 52534, 3, 0.5, 2.0
+
+# Caves and tunnels form at the intersection of the two noises