+#### Mapgen flat
+
+# Map generation attributes specific to Mapgen flat.
+# Occasional lakes and hills can be added to the flat world.
+# The default flags set in the engine are: none
+# The flags string modifies the engine defaults.
+# 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: lakes, hills, , nolakes, nohills
+# mgflat_spflags =
+
+# Y of flat ground.
+# type: int
+# mgflat_ground_level = 8
+
+# Y of upper limit of large pseudorandom caves.
+# type: int
+# mgflat_large_cave_depth = -33
+
+# Terrain noise threshold for lakes.
+# Controls proportion of world area covered by lakes.
+# Adjust towards 0.0 for a larger proportion.
+# type: float
+# mgflat_lake_threshold = -0.45
+
+# Controls steepness/depth of lake depressions.
+# type: float
+# mgflat_lake_steepness = 48.0
+
+# Terrain noise threshold for hills.
+# Controls proportion of world area covered by hills.
+# Adjust towards 0.0 for a larger proportion.
+# type: float
+# mgflat_hill_threshold = 0.45
+
+# Controls steepness/height of hills.
+# type: float
+# mgflat_hill_steepness = 64.0
+
+# Determines terrain shape.
+# The 3 numbers in brackets control the scale of the
+# terrain, the 3 numbers should be identical.
+# type: noise_params
+# mgflat_np_terrain = 0, 1, (600, 600, 600), 7244, 5, 0.6, 2.0
+
+# type: noise_params
+# mgflat_np_filler_depth = 0, 1.2, (150, 150, 150), 261, 3, 0.7, 2.0
+
+# type: noise_params
+# mgflat_np_cave1 = 0, 12, (128, 128, 128), 52534, 4, 0.5, 2.0
+
+# type: noise_params
+# mgflat_np_cave2 = 0, 12, (128, 128, 128), 10325, 4, 0.5, 2.0
+
+#### Mapgen fractal
+
+# Choice of 18 fractals from 9 formulas.
+# 1 = 4D "Roundy" mandelbrot set.
+# 2 = 4D "Roundy" julia set.
+# 3 = 4D "Squarry" mandelbrot set.
+# 4 = 4D "Squarry" julia set.
+# 5 = 4D "Mandy Cousin" mandelbrot set.
+# 6 = 4D "Mandy Cousin" julia set.
+# 7 = 4D "Variation" mandelbrot set.
+# 8 = 4D "Variation" julia set.
+# 9 = 3D "Mandelbrot/Mandelbar" mandelbrot set.
+# 10 = 3D "Mandelbrot/Mandelbar" julia set.
+# 11 = 3D "Christmas Tree" mandelbrot set.
+# 12 = 3D "Christmas Tree" julia set.
+# 13 = 3D "Mandelbulb" mandelbrot set.
+# 14 = 3D "Mandelbulb" julia set.
+# 15 = 3D "Cosine Mandelbulb" mandelbrot set.
+# 16 = 3D "Cosine Mandelbulb" julia set.
+# 17 = 4D "Mandelbulb" mandelbrot set.
+# 18 = 4D "Mandelbulb" julia set.
+# type: int min: 1 max: 18
+# mgfractal_fractal = 1
+
+# Iterations of the recursive function.
+# Controls the amount of fine detail.
+# type: int
+# mgfractal_iterations = 11
+
+# Approximate (X,Y,Z) scale of fractal in nodes.
+# type: v3f
+# mgfractal_scale = (4096.0, 1024.0, 4096.0)
+
+# (X,Y,Z) offset of fractal from world centre in units of 'scale'.
+# Used to move a suitable spawn area of low land close to (0, 0).
+# The default is suitable for mandelbrot sets, it needs to be edited for julia sets.
+# Range roughly -2 to 2. Multiply by 'scale' for offset in nodes.
+# type: v3f
+# mgfractal_offset = (1.79, 0.0, 0.0)
+
+# W co-ordinate of the generated 3D slice of a 4D fractal.
+# Determines which 3D slice of the 4D shape is generated.
+# Has no effect on 3D fractals.
+# Range roughly -2 to 2.
+# type: float
+# mgfractal_slice_w = 0.0
+
+# Julia set only: X component of hypercomplex constant determining julia shape.
+# Range roughly -2 to 2.
+# type: float
+# mgfractal_julia_x = 0.33
+
+# Julia set only: Y component of hypercomplex constant determining julia shape.
+# Range roughly -2 to 2.
+# type: float
+# mgfractal_julia_y = 0.33
+
+# Julia set only: Z component of hypercomplex constant determining julia shape.
+# Range roughly -2 to 2.
+# type: float
+# mgfractal_julia_z = 0.33
+
+# Julia set only: W component of hypercomplex constant determining julia shape.
+# Has no effect on 3D fractals.
+# Range roughly -2 to 2.
+# type: float
+# mgfractal_julia_w = 0.33
+
+# type: noise_params
+# mgfractal_np_seabed = -14, 9, (600, 600, 600), 41900, 5, 0.6, 2.0
+
+# type: noise_params
+# mgfractal_np_filler_depth = 0, 1.2, (150, 150, 150), 261, 3, 0.7, 2.0
+
+# type: noise_params
+# mgfractal_np_cave1 = 0, 12, (128, 128, 128), 52534, 4, 0.5, 2.0
+
+# type: noise_params
+# mgfractal_np_cave2 = 0, 12, (128, 128, 128), 10325, 4, 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.
+# The default flags set in the engine are: altitude_chill, humid_rivers
+# The flags string modifies the engine defaults.
+# 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
+# mg_valleys_altitude_chill = 90
+
+# Depth below which you'll find large caves.
+# type: int
+# mg_valleys_large_cave_depth = -33
+
+# Creates unpredictable lava features in caves.
+# These can make mining difficult. Zero disables them. (0-10)
+# type: int
+# mg_valleys_lava_features = 0
+
+# Depth below which you'll find massive caves.
+# type: int
+# mg_valleys_massive_cave_depth = -256
+
+# How deep to make rivers
+# type: int
+# mg_valleys_river_depth = 4
+
+# How wide to make rivers
+# type: int
+# mg_valleys_river_size = 5
+
+# Creates unpredictable water features in caves.
+# These can make mining difficult. Zero disables them. (0-10)
+# type: int
+# mg_valleys_water_features = 0
+
+##### Noises
+
+# Caves and tunnels form at the intersection of the two noises
+# type: noise_params
+# mg_valleys_np_cave1 = 0, 12, (100, 100, 100), 52534, 4, 0.5, 2.0
+
+# Caves and tunnels form at the intersection of the two noises
+# type: noise_params
+# mg_valleys_np_cave2 = 0, 12, (100, 100, 100), 10325, 4, 0.5, 2.0
+
+# The depth of dirt or other filler
+# type: noise_params
+# mg_valleys_np_filler_depth = 0, 1.2, (256, 256, 256), 1605, 3, 0.5, 2.0
+
+# Massive caves form here.
+# type: noise_params
+# mg_valleys_np_massive_caves = 0, 1, (768, 256, 768), 59033, 6, 0.63, 2.0
+
+# River noise -- rivers occur close to zero
+# type: noise_params
+# mg_valleys_np_rivers = 0, 1, (256, 256, 256), -6050, 5, 0.6, 2.0
+
+# Base terrain height
+# type: noise_params
+# mg_valleys_np_terrain_height = -10, 50, (1024, 1024, 1024), 5202, 6, 0.4, 2.0
+
+# Raises terrain to make valleys around the rivers
+# type: noise_params
+# mg_valleys_np_valley_depth = 5, 4, (512, 512, 512), -1914, 1, 1.0, 2.0
+
+# Slope and fill work together to modify the heights
+# type: noise_params
+# mg_valleys_np_inter_valley_fill = 0, 1, (256, 512, 256), 1993, 6, 0.8, 2.0
+
+# Amplifies the valleys
+# type: noise_params
+# mg_valleys_np_valley_profile = 0.6, 0.5, (512, 512, 512), 777, 1, 1.0, 2.0
+
+# Slope and fill work together to modify the heights
+# type: noise_params
+# mg_valleys_np_inter_valley_slope = 0.5, 0.5, (128, 128, 128), 746, 1, 1.0, 2.0
+