diff --git a/src/net/torvald/terrarum/modulebasegame/worldgenerator/Biomegen.kt b/src/net/torvald/terrarum/modulebasegame/worldgenerator/Biomegen.kt
index 593036f7f..2705e07bb 100644
--- a/src/net/torvald/terrarum/modulebasegame/worldgenerator/Biomegen.kt
+++ b/src/net/torvald/terrarum/modulebasegame/worldgenerator/Biomegen.kt
@@ -20,7 +20,7 @@ class Biomegen(world: GameWorld, seed: Long, params: Any) : Gen(world, seed, par
 
     private val threadExecutor = TerrarumIngame.worldgenThreadExecutor
 
-    private val genSlices = max(threadExecutor.threadCount, world.width / 8)
+    private val genSlices = max(threadExecutor.threadCount, world.width / 9)
 
     private val YHEIGHT_MAGIC = 2800.0 / 3.0
     private val YHEIGHT_DIVISOR = 2.0 / 7.0
diff --git a/src/net/torvald/terrarum/modulebasegame/worldgenerator/Oregen.kt b/src/net/torvald/terrarum/modulebasegame/worldgenerator/Oregen.kt
index ccf382f1f..02716b3bb 100644
--- a/src/net/torvald/terrarum/modulebasegame/worldgenerator/Oregen.kt
+++ b/src/net/torvald/terrarum/modulebasegame/worldgenerator/Oregen.kt
@@ -25,7 +25,7 @@ import kotlin.math.sqrt
 class Oregen(world: GameWorld, private val caveAttenuateBiasScaled: ModuleScaleDomain, seed: Long, private val ores: List<OregenParams>) : Gen(world, seed) {
 
     private val threadExecutor = TerrarumIngame.worldgenThreadExecutor
-    private val genSlices = max(threadExecutor.threadCount, world.width / 8)
+    private val genSlices = max(threadExecutor.threadCount, world.width / 9)
 
     override fun getDone() {
         threadExecutor.renew()
diff --git a/src/net/torvald/terrarum/modulebasegame/worldgenerator/OregenAutotiling.kt b/src/net/torvald/terrarum/modulebasegame/worldgenerator/OregenAutotiling.kt
index 951415e7c..9ec41aab5 100644
--- a/src/net/torvald/terrarum/modulebasegame/worldgenerator/OregenAutotiling.kt
+++ b/src/net/torvald/terrarum/modulebasegame/worldgenerator/OregenAutotiling.kt
@@ -20,7 +20,7 @@ import kotlin.math.max
 class OregenAutotiling(world: GameWorld, seed: Long, val tilingModes: HashMap<ItemID, String>) : Gen(world, seed) {
 
     private val threadExecutor = TerrarumIngame.worldgenThreadExecutor
-    private val genSlices = max(threadExecutor.threadCount, world.width / 8)
+    private val genSlices = max(threadExecutor.threadCount, world.width / 9)
 
     override fun getDone() {
         threadExecutor.renew()
diff --git a/src/net/torvald/terrarum/modulebasegame/worldgenerator/Terragen.kt b/src/net/torvald/terrarum/modulebasegame/worldgenerator/Terragen.kt
index b4624dfba..cdad6b9f3 100644
--- a/src/net/torvald/terrarum/modulebasegame/worldgenerator/Terragen.kt
+++ b/src/net/torvald/terrarum/modulebasegame/worldgenerator/Terragen.kt
@@ -24,7 +24,7 @@ class Terragen(world: GameWorld, val highlandLowlandSelectCache: ModuleCache, se
 
     private val threadExecutor = TerrarumIngame.worldgenThreadExecutor
 
-    private val genSlices = max(threadExecutor.threadCount, world.width / 8)
+    private val genSlices = max(threadExecutor.threadCount, world.width / 9)
 
 
     private val dirtStoneDitherSize = 3 // actual dither size will be double of this value