From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach.brown@destroystokyo.com>
Date: Tue, 1 Mar 2016 23:58:50 -0600
Subject: [PATCH] Configurable top of nether void damage


diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index a07aafad9f94b85a689568c1784727a8c5b0452b..45aca8dde5b6f1a3aef907b1a74809e7f4aa66e4 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -653,7 +653,11 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
     }
 
     public void checkOutOfWorld() {
-        if (this.getY() < (double) (this.level.getMinBuildHeight() - 64)) {
+        // Paper start - Configurable nether ceiling damage
+        if (this.getY() < (double) (this.level.getMinBuildHeight() - 64) || (this.level.getWorld().getEnvironment() == org.bukkit.World.Environment.NETHER
+            && level.paperConfig().environment.netherCeilingVoidDamageHeight > 0
+            && this.getY() >= this.level.paperConfig().environment.netherCeilingVoidDamageHeight)) {
+            // Paper end
             this.outOfWorld();
         }
 
