From 741b356b7d816064e0f60b91e53074a3d1414a3d Mon Sep 17 00:00:00 2001
From: Dereku <iam@derekunavailable.direct>
Date: Fri, 30 Jan 2026 02:37:51 +0700
Subject: [PATCH] Do not generate big trees when we hit the world's height
 limit

---
 src/net/minecraft/world/generators/WorldGenBigTree.java | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/net/minecraft/world/generators/WorldGenBigTree.java b/src/net/minecraft/world/generators/WorldGenBigTree.java
index 5e0c01a..c1fd20a 100644
--- a/src/net/minecraft/world/generators/WorldGenBigTree.java
+++ b/src/net/minecraft/world/generators/WorldGenBigTree.java
@@ -289,7 +289,10 @@ public class WorldGenBigTree extends WorldGenerator {
                 var13[var6] = MathHelper.floor_double((double) var1[var6] + (double) var14 * var9);
                 var13[var7] = MathHelper.floor_double((double) var1[var7] + (double) var14 * var11);
                 int var16 = this.worldObj.getBlockId(var13[0], var13[1], var13[2]);
-                if (var16 != 0 && var16 != 18) {
+                // Patch start
+                // if (var16 != 0 && var16 != 18) {
+                if ((var16 != 0 && var16 != 18) || var13[1] >= 128) {
+                // Patch end
                     break;
                 }
             }