Mgflat/fractal/v7/valleys: Denser 3D noise tunnels

Reduce spread from 96 to primes 61 and 67 (either side of 64)
Prime spreads help to keep 3D noise periodic features unaligned
'cave width' 0.2 to preserve tunnel width
Reduce octaves to 3 to improve network structure

4 files changed, 12 insertions, 12 deletions

diff --git a/src/mapgen_flat.cpp b/src/mapgen_flat.cpp
index 7cc6aad5c..956af999a 100644
--- a/src/mapgen_flat.cpp
+++ b/src/mapgen_flat.cpp
@@ -84,7 +84,7 @@ MapgenFlatParams::MapgenFlatParams()
 	spflags          = 0;
 	ground_level     = 8;
 	large_cave_depth = -33;
-	cave_width       = 0.3;
+	cave_width       = 0.2;
 	lake_threshold   = -0.45;
 	lake_steepness   = 48.0;
 	hill_threshold   = 0.45;
@@ -92,8 +92,8 @@ MapgenFlatParams::MapgenFlatParams()
 
 	np_terrain      = NoiseParams(0, 1,   v3f(600, 600, 600), 7244,  5, 0.6, 2.0);
 	np_filler_depth = NoiseParams(0, 1.2, v3f(150, 150, 150), 261,   3, 0.7, 2.0);
-	np_cave1        = NoiseParams(0, 12,  v3f(96,  96,  96),  52534, 4, 0.5, 2.0);
-	np_cave2        = NoiseParams(0, 12,  v3f(96,  96,  96),  10325, 4, 0.5, 2.0);
+	np_cave1        = NoiseParams(0, 12,  v3f(61,  61,  61),  52534, 3, 0.5, 2.0);
+	np_cave2        = NoiseParams(0, 12,  v3f(67,  67,  67),  10325, 3, 0.5, 2.0);
 }
 
 
diff --git a/src/mapgen_fractal.cpp b/src/mapgen_fractal.cpp
index c47a7bfdc..9e4c210dc 100644
--- a/src/mapgen_fractal.cpp
+++ b/src/mapgen_fractal.cpp
@@ -86,7 +86,7 @@ MapgenFractal::~MapgenFractal()
 MapgenFractalParams::MapgenFractalParams()
 {
 	spflags    = 0;
-	cave_width = 0.3;
+	cave_width = 0.2;
 	fractal    = 1;
 	iterations = 11;
 	scale      = v3f(4096.0, 1024.0, 4096.0);
@@ -99,8 +99,8 @@ MapgenFractalParams::MapgenFractalParams()
 
 	np_seabed       = NoiseParams(-14, 9,   v3f(600, 600, 600), 41900, 5, 0.6, 2.0);
 	np_filler_depth = NoiseParams(0,   1.2, v3f(150, 150, 150), 261,   3, 0.7, 2.0);
-	np_cave1        = NoiseParams(0,   12,  v3f(96,  96,  96),  52534, 4, 0.5, 2.0);
-	np_cave2        = NoiseParams(0,   12,  v3f(96,  96,  96),  10325, 4, 0.5, 2.0);
+	np_cave1        = NoiseParams(0,   12,  v3f(61,  61,  61),  52534, 3, 0.5, 2.0);
+	np_cave2        = NoiseParams(0,   12,  v3f(67,  67,  67),  10325, 3, 0.5, 2.0);
 }
 
 
diff --git a/src/mapgen_v7.cpp b/src/mapgen_v7.cpp
index 35dcdcd94..c24b3e8d1 100644
--- a/src/mapgen_v7.cpp
+++ b/src/mapgen_v7.cpp
@@ -94,7 +94,7 @@ MapgenV7::~MapgenV7()
 MapgenV7Params::MapgenV7Params()
 {
 	spflags    = MGV7_MOUNTAINS | MGV7_RIDGES;
-	cave_width = 0.3;
+	cave_width = 0.2;
 
 	np_terrain_base    = NoiseParams(4,    70,  v3f(600,  600,  600),  82341, 5, 0.6,  2.0);
 	np_terrain_alt     = NoiseParams(4,    25,  v3f(600,  600,  600),  5934,  5, 0.6,  2.0);
@@ -105,8 +105,8 @@ MapgenV7Params::MapgenV7Params()
 	np_ridge_uwater    = NoiseParams(0,    1,   v3f(1000, 1000, 1000), 85039, 5, 0.6,  2.0);
 	np_mountain        = NoiseParams(-0.6, 1,   v3f(250,  350,  250),  5333,  5, 0.63, 2.0);
 	np_ridge           = NoiseParams(0,    1,   v3f(100,  100,  100),  6467,  4, 0.75, 2.0);
-	np_cave1           = NoiseParams(0,    12,  v3f(96,   96,   96),   52534, 4, 0.5,  2.0);
-	np_cave2           = NoiseParams(0,    12,  v3f(96,   96,   96),   10325, 4, 0.5,  2.0);
+	np_cave1           = NoiseParams(0,    12,  v3f(61,   61,   61),   52534, 3, 0.5,  2.0);
+	np_cave2           = NoiseParams(0,    12,  v3f(67,   67,   67),   10325, 3, 0.5,  2.0);
 }
 
 
diff --git a/src/mapgen_valleys.cpp b/src/mapgen_valleys.cpp
index bbf20719d..02a8fbfe0 100644
--- a/src/mapgen_valleys.cpp
+++ b/src/mapgen_valleys.cpp
@@ -144,10 +144,10 @@ MapgenValleysParams::MapgenValleysParams()
 	river_depth        = 4;  // How deep to carve river channels.
 	river_size         = 5;  // How wide to make rivers.
 	water_features     = 0;  // How often water will occur in caves.
-	cave_width         = 0.3;
+	cave_width         = 0.2;
 
-	np_cave1              = NoiseParams(0,     12,   v3f(96,   96,   96),   52534, 4, 0.5,   2.0);
-	np_cave2              = NoiseParams(0,     12,   v3f(96,   96,   96),   10325, 4, 0.5,   2.0);
+	np_cave1              = NoiseParams(0,     12,   v3f(61,   61,   61),   52534, 3, 0.5,   2.0);
+	np_cave2              = NoiseParams(0,     12,   v3f(67,   67,   67),   10325, 3, 0.5,   2.0);
 	np_filler_depth       = NoiseParams(0.f,   1.2f, v3f(256,  256,  256),  1605,  3, 0.5f,  2.f);
 	np_inter_valley_fill  = NoiseParams(0.f,   1.f,  v3f(256,  512,  256),  1993,  6, 0.8f,  2.f);
 	np_inter_valley_slope = NoiseParams(0.5f,  0.5f, v3f(128,  128,  128),  746,   1, 1.f,   2.f);