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Add world configuration setting: chunks.mob-spawning-disable-radius-around-spawn-chunk #13110

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Add world configuration setting: chunks.mob-spawning-disable-radius-around-spawn-chunk #13110

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edea4e9
Disable mob spawning within specified radius around spawn chunk
Sep 29, 2025
43b6dd4
Disable mob spawning within specified radius around spawn chunk
Sep 29, 2025
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24 changes: 24 additions & 0 deletions paper-server/patches/sources/net/minecraft/server/level/ServerChunkCache.java.patch
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Original file line number Diff line number Diff line change
Expand Up @@ -188,6 +188,30 @@
} else {
filteredSpawningCategories = List.of();
}
@@ -430,6 +_,23 @@
this.level.tickThunder(chunk);
}

+ // Paper start - disable mob spawning within configured radius around spawn chunk
+ int mobSpawningDisableRadiusAroundSpawnChunk = level.paperConfig().chunks.mobSpawningDisableRadiusAroundSpawnChunk;
+
+ if (mobSpawningDisableRadiusAroundSpawnChunk >= 0)
+ {
+ ChunkPos spawnChunk = new net.minecraft.world.level.ChunkPos(level.getSharedSpawnPos());
+
+ if (pos.x <= spawnChunk.x + mobSpawningDisableRadiusAroundSpawnChunk &&
+ pos.x >= spawnChunk.x - mobSpawningDisableRadiusAroundSpawnChunk &&
+ pos.z <= spawnChunk.z + mobSpawningDisableRadiusAroundSpawnChunk &&
+ pos.z >= spawnChunk.z - mobSpawningDisableRadiusAroundSpawnChunk)
+ {
+ return;
+ }
+ }
+ // Paper end - disable mob spawning within configured radius around spawn chunk
+
if (!spawnCategories.isEmpty()) {
if (this.level.canSpawnEntitiesInChunk(pos)) {
NaturalSpawner.spawnForChunk(this.level, chunk, spawnState, spawnCategories);
@@ -547,8 +_,13 @@

@Override
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1 change: 1 addition & 0 deletions paper-server/src/main/java/io/papermc/paper/configuration/WorldConfiguration.java
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Original file line number Diff line number Diff line change
Expand Up @@ -515,6 +515,7 @@ public class Chunks extends ConfigurationPart {
map.put(EntityType.SMALL_FIREBALL, -1);
});
public boolean flushRegionsOnSave = false;
public int mobSpawningDisableRadiusAroundSpawnChunk = -1;

@PostProcess
private void postProcess() {
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