Smooth transition to the desert biome.

diff --git a/src/mapgen.cpp b/src/mapgen.cpp
index af53d0091db6abac53e5eef4dd17404385502418..b37d03501aad12500e0ac882f0eb164d80a78329 100644 (file)
--- a/src/mapgen.cpp
+++ b/src/mapgen.cpp
@@ -1297,7 +1297,9 @@ BiomeType get_biome(u64 seed, v2s16 p2d)
        double d = noise2d_perlin(
                        0.6+(float)p2d.X/250, 0.2+(float)p2d.Y/250,
                        seed+9130, 3, 0.50);
-       if(d > 0.35)
+       if(d > 0.45) 
+               return BT_DESERT;
+       if(d > 0.35 && (noise2d( p2d.X, p2d.Y, int(seed) ) + 1.0) > ( 0.45 - d ) * 20.0  ) 
                return BT_DESERT;
        return BT_NORMAL;
 };