diff --git a/arclight-common/src/main/java/io/izzel/arclight/common/asm/SwitchTableFixer.java b/arclight-common/src/main/java/io/izzel/arclight/common/asm/SwitchTableFixer.java
index 64b7c2a0..447d36d0 100644
--- a/arclight-common/src/main/java/io/izzel/arclight/common/asm/SwitchTableFixer.java
+++ b/arclight-common/src/main/java/io/izzel/arclight/common/asm/SwitchTableFixer.java
@@ -29,6 +29,7 @@ public class SwitchTableFixer implements Implementer {
     private static final Set<String> ENUMS = ImmutableSet.<String>builder()
         .add("org/bukkit/Material")
         .add("org/bukkit/entity/EntityType")
+        .add("org/bukkit/World$Environment")
         .build();
 
     public byte[] processClass(byte[] bytes) {
diff --git a/arclight-common/src/main/java/io/izzel/arclight/common/mixin/core/server/MinecraftServerMixin.java b/arclight-common/src/main/java/io/izzel/arclight/common/mixin/core/server/MinecraftServerMixin.java
index 670771c0..fac78759 100644
--- a/arclight-common/src/main/java/io/izzel/arclight/common/mixin/core/server/MinecraftServerMixin.java
+++ b/arclight-common/src/main/java/io/izzel/arclight/common/mixin/core/server/MinecraftServerMixin.java
@@ -353,6 +353,11 @@ public abstract class MinecraftServerMixin extends RecursiveEventLoop<TickDelaye
         if (this.forceTicks) cir.setReturnValue(true);
     }
 
+    @Inject(method = "loadWorlds", at = @At(value = "INVOKE", shift = At.Shift.AFTER, target = "Lnet/minecraftforge/common/DimensionManager;fireRegister()V", remap = false))
+    private void arclight$registerEnv(SaveHandler saveHandlerIn, WorldInfo info, WorldSettings worldSettingsIn, IChunkStatusListener chunkStatusListenerIn, CallbackInfo ci) {
+        BukkitRegistry.registerEnvironments();
+    }
+
     @Inject(method = "loadWorlds", locals = LocalCapture.CAPTURE_FAILHARD, at = @At(value = "INVOKE", shift = At.Shift.AFTER, target = "Lnet/minecraft/server/MinecraftServer;func_213204_a(Lnet/minecraft/world/storage/DimensionSavedDataManager;)V"))
     private void arclight$worldInit(SaveHandler p_213194_1_, WorldInfo info, WorldSettings p_213194_3_, IChunkStatusListener p_213194_4_, CallbackInfo ci, ServerWorld serverWorld) {
         if (((CraftServer) Bukkit.getServer()).scoreboardManager == null) {
diff --git a/arclight-common/src/main/java/io/izzel/arclight/common/mod/server/BukkitRegistry.java b/arclight-common/src/main/java/io/izzel/arclight/common/mod/server/BukkitRegistry.java
index 6cb88f14..3e544b0b 100644
--- a/arclight-common/src/main/java/io/izzel/arclight/common/mod/server/BukkitRegistry.java
+++ b/arclight-common/src/main/java/io/izzel/arclight/common/mod/server/BukkitRegistry.java
@@ -6,6 +6,7 @@ import io.izzel.arclight.api.EnumHelper;
 import io.izzel.arclight.api.Unsafe;
 import io.izzel.arclight.common.bridge.bukkit.EntityTypeBridge;
 import io.izzel.arclight.common.bridge.bukkit.MaterialBridge;
+import io.izzel.arclight.common.bridge.world.dimension.DimensionTypeBridge;
 import io.izzel.arclight.common.mod.ArclightMod;
 import io.izzel.arclight.common.mod.util.ResourceLocationUtil;
 import io.izzel.arclight.common.mod.util.potion.ArclightPotionEffect;
@@ -16,12 +17,15 @@ import net.minecraft.block.Block;
 import net.minecraft.item.Item;
 import net.minecraft.potion.Effect;
 import net.minecraft.util.ResourceLocation;
+import net.minecraft.world.dimension.DimensionType;
+import net.minecraftforge.common.DimensionManager;
 import net.minecraftforge.fml.CrashReportExtender;
 import net.minecraftforge.registries.ForgeRegistries;
 import net.minecraftforge.registries.ForgeRegistry;
 import net.minecraftforge.registries.IForgeRegistry;
 import org.bukkit.Material;
 import org.bukkit.NamespacedKey;
+import org.bukkit.World;
 import org.bukkit.craftbukkit.v.CraftCrashReport;
 import org.bukkit.craftbukkit.v.enchantments.CraftEnchantment;
 import org.bukkit.craftbukkit.v.util.CraftMagicNumbers;
@@ -41,12 +45,14 @@ public class BukkitRegistry {
 
     private static final List<Class<?>> MAT_CTOR = ImmutableList.of(int.class);
     private static final List<Class<?>> ENTITY_CTOR = ImmutableList.of(String.class, Class.class, int.class);
+    private static final List<Class<?>> ENV_CTOR = ImmutableList.of(int.class);
     private static final Map<String, Material> BY_NAME = getStatic(Material.class, "BY_NAME");
     private static final Map<Block, Material> BLOCK_MATERIAL = getStatic(CraftMagicNumbers.class, "BLOCK_MATERIAL");
     private static final Map<Item, Material> ITEM_MATERIAL = getStatic(CraftMagicNumbers.class, "ITEM_MATERIAL");
     private static final Map<Material, Item> MATERIAL_ITEM = getStatic(CraftMagicNumbers.class, "MATERIAL_ITEM");
     private static final Map<Material, Block> MATERIAL_BLOCK = getStatic(CraftMagicNumbers.class, "MATERIAL_BLOCK");
     private static final Map<String, EntityType> ENTITY_NAME_MAP = getStatic(EntityType.class, "NAME_MAP");
+    private static final Map<Integer, World.Environment> ENVIRONMENT_MAP = getStatic(World.Environment.class, "lookup");
 
     public static void registerAll() {
         CrashReportExtender.registerCrashCallable("Arclight", () -> new CraftCrashReport().call().toString());
@@ -56,6 +62,24 @@ public class BukkitRegistry {
         loadEntities();
     }
 
+    public static void registerEnvironments() {
+        int i = World.Environment.values().length;
+        List<World.Environment> newTypes = new ArrayList<>();
+        for (DimensionType dimensionType : DimensionManager.getRegistry()) {
+            DimensionType actual = ((DimensionTypeBridge) dimensionType).bridge$getType();
+            World.Environment environment = World.Environment.getEnvironment(actual.getId());
+            if (environment == null) {
+                String name = ResourceLocationUtil.standardize(actual.getRegistryName());
+                environment = EnumHelper.makeEnum(World.Environment.class, name, i++, ENV_CTOR, ImmutableList.of(actual.getId()));
+                newTypes.add(environment);
+                ENVIRONMENT_MAP.put(actual.getId(), environment);
+                ArclightMod.LOGGER.debug("Registered {} as entity {}", actual.getRegistryName(), environment);
+            }
+        }
+        EnumHelper.addEnums(World.Environment.class, newTypes);
+        ArclightMod.LOGGER.info("registry.environment", newTypes.size());
+    }
+
     private static void loadEntities() {
         int origin = EntityType.values().length;
         int i = origin;
diff --git a/arclight-common/src/main/java/io/izzel/arclight/common/mod/util/remapper/ClassLoaderRepo.java b/arclight-common/src/main/java/io/izzel/arclight/common/mod/util/remapper/ClassLoaderRepo.java
index a3d1cadb..2a434fef 100644
--- a/arclight-common/src/main/java/io/izzel/arclight/common/mod/util/remapper/ClassLoaderRepo.java
+++ b/arclight-common/src/main/java/io/izzel/arclight/common/mod/util/remapper/ClassLoaderRepo.java
@@ -7,6 +7,7 @@ import org.objectweb.asm.tree.ClassNode;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URL;
+import java.net.URLClassLoader;
 import java.net.URLConnection;
 
 public class ClassLoaderRepo implements ClassRepo {
@@ -19,7 +20,9 @@ public class ClassLoaderRepo implements ClassRepo {
 
     @Override
     public ClassNode findClass(String internalName) {
-        URL url = classLoader.getResource(internalName + ".class");
+        URL url = classLoader instanceof URLClassLoader
+            ? ((URLClassLoader) classLoader).findResource(internalName + ".class") // search local
+            : classLoader.getResource(internalName + ".class");
         if (url == null) return null;
         try {
             URLConnection connection = url.openConnection();
diff --git a/i18n-config/src/main/resources/META-INF/i18n/zh_cn.conf b/i18n-config/src/main/resources/META-INF/i18n/zh_cn.conf
index f5462c0d..d3d21f67 100644
--- a/i18n-config/src/main/resources/META-INF/i18n/zh_cn.conf
+++ b/i18n-config/src/main/resources/META-INF/i18n/zh_cn.conf
@@ -52,6 +52,7 @@ registry {
   potion = "注册了 {} 个新的药水效果"
   material = "注册了 {} 个材料，其中 {} 个方块 {} 个物品"
   entity-type = "注册了 {} 个新的生物类型"
+  environment = "注册了 {} 个新的世界类型"
   meta-type {
     not-subclass = "{} 不是 {} 的子类"
     error = "{} 提供的 itemMetaType {} 无效: {}"