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-rw-r--r--src/mapgen/mapgen.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/mapgen/mapgen.cpp b/src/mapgen/mapgen.cpp
index a1ac7a5ca..bd074d158 100644
--- a/src/mapgen/mapgen.cpp
+++ b/src/mapgen/mapgen.cpp
@@ -831,7 +831,9 @@ void MapgenBasic::dustTopNodes()
void MapgenBasic::generateCavesNoiseIntersection(s16 max_stone_y)
{
- if (node_min.Y > max_stone_y)
+ // cave_width >= 10 is used to disable generation and avoid the intensive
+ // 3D noise calculations. Tunnels already have zero width when cave_width > 1.
+ if (node_min.Y > max_stone_y || cave_width >= 10.0f)
return;
CavesNoiseIntersection caves_noise(ndef, m_bmgr, csize,