diff --git a/Packages/src/Runtime/Internal/Utilities/Misc.cs b/Packages/src/Runtime/Internal/Utilities/Misc.cs
index 7b3f0ba..2412588 100644
--- a/Packages/src/Runtime/Internal/Utilities/Misc.cs
+++ b/Packages/src/Runtime/Internal/Utilities/Misc.cs
@@ -20,7 +20,9 @@ internal static class Misc
     {
         public static T[] FindObjectsOfType<T>() where T : Object
         {
-#if UNITY_2023_1_OR_NEWER
+#if UNITY_6000_4_OR_NEWER
+            return Object.FindObjectsByType<T>(FindObjectsInactive.Include);
+#elif UNITY_2023_1_OR_NEWER
             return Object.FindObjectsByType<T>(FindObjectsInactive.Include, FindObjectsSortMode.None);
 #else
             return Object.FindObjectsOfType<T>();
diff --git a/Packages/src/Runtime/Internal/Utilities/ObjectRepository.cs b/Packages/src/Runtime/Internal/Utilities/ObjectRepository.cs
index 227b4da..7fa9cce 100644
--- a/Packages/src/Runtime/Internal/Utilities/ObjectRepository.cs
+++ b/Packages/src/Runtime/Internal/Utilities/ObjectRepository.cs
@@ -9,7 +9,11 @@ namespace Coffee.UIEffectInternal
     internal class ObjectRepository<T> where T : Object
     {
         private readonly Dictionary<Hash128, Entry> _cache = new Dictionary<Hash128, Entry>(8);
+#if UNITY_6000_4_OR_NEWER
+        private readonly Dictionary<EntityId, Hash128> _objectKey = new Dictionary<EntityId, Hash128>(8);
+#else
         private readonly Dictionary<int, Hash128> _objectKey = new Dictionary<int, Hash128>(8);
+#endif
         private readonly string _name;
         private readonly Action<T> _onRelease;
         private readonly Stack<Entry> _pool = new Stack<Entry>(8);
@@ -130,7 +134,11 @@ private void Add(Hash128 hash, ref T obj, T newObject)
             newEntry.hash = hash;
             newEntry.reference = 1;
             _cache[hash] = newEntry;
+#if UNITY_6000_4_OR_NEWER
+            _objectKey[newObject.GetEntityId()] = hash;
+#else
             _objectKey[newObject.GetInstanceID()] = hash;
+#endif
             Logging.Log(_name, $"<color=#03c700>Add</color>(total#{count}): {newEntry}");
             Release(ref obj);
             obj = newObject;
@@ -146,7 +154,11 @@ public void Release(ref T obj)
 
             // Find and release the entry.
             Profiler.BeginSample("(COF)[ObjectRepository] Release");
+#if UNITY_6000_4_OR_NEWER
+            var id = obj.GetEntityId();
+#else
             var id = obj.GetInstanceID();
+#endif
             if (_objectKey.TryGetValue(id, out var hash)
                 && _cache.TryGetValue(hash, out var entry))
             {
@@ -175,7 +187,11 @@ private void Remove(Entry entry)
 
             Profiler.BeginSample("(COF)[ObjectRepository] Remove");
             _cache.Remove(entry.hash);
+#if UNITY_6000_4_OR_NEWER
+            _objectKey.Remove(entry.storedObject.GetEntityId());
+#else
             _objectKey.Remove(entry.storedObject.GetInstanceID());
+#endif
             _pool.Push(entry);
             entry.reference = 0;
             Logging.Log(_name, $"<color=#f29e03>Remove</color>(total#{_cache.Count}): {entry}");
diff --git a/Packages/src/Runtime/Internal/Utilities/ShaderVariantRegistry.cs b/Packages/src/Runtime/Internal/Utilities/ShaderVariantRegistry.cs
index 7408934..04ded3f 100644
--- a/Packages/src/Runtime/Internal/Utilities/ShaderVariantRegistry.cs
+++ b/Packages/src/Runtime/Internal/Utilities/ShaderVariantRegistry.cs
@@ -44,7 +44,11 @@ public override int GetHashCode()
             }
         }
 
+#if UNITY_6000_4_OR_NEWER
+        private Dictionary<EntityId, string> _cachedOptionalShaders = new Dictionary<EntityId, string>();
+#else
         private Dictionary<int, string> _cachedOptionalShaders = new Dictionary<int, string>();
+#endif
 
         [SerializeField]
         private List<StringPair> m_OptionalShaders = new List<StringPair>();
@@ -71,7 +75,11 @@ public Shader FindOptionalShader(Shader shader,
             if (!shader) return null;
 
             // Already cached.
+#if UNITY_6000_4_OR_NEWER
+            var id = shader.GetEntityId();
+#else
             var id = shader.GetInstanceID();
+#endif
             if (_cachedOptionalShaders.TryGetValue(id, out var optionalShaderName))
             {
                 return Shader.Find(optionalShaderName);
@@ -270,7 +278,13 @@ internal void RegisterVariant(Material material, string path)
                 _sb.Length--; // Remove last space.
             }
 
-            var hash = new Hash128((uint)shader.GetInstanceID(), (uint)GetContentsHash(_sb), 0, 0);
+#if UNITY_6000_4_OR_NEWER
+            ulong shaderIdFull = EntityId.ToULong(shader.GetEntityId());
+            uint shaderId = (uint)(shaderIdFull ^ (shaderIdFull >>32));
+#else
+            uint shaderId = (uint)shader.GetInstanceID();
+#endif
+            var hash = new Hash128(shaderId, (uint)GetContentsHash(_sb), 0, 0);
             if (_cachedVariants.TryGetValue(hash, out var result))
             {
                 Profiler.EndSample();
diff --git a/Packages/src/Runtime/UIEffectBase.cs b/Packages/src/Runtime/UIEffectBase.cs
index 486f0e9..acf24ef 100644
--- a/Packages/src/Runtime/UIEffectBase.cs
+++ b/Packages/src/Runtime/UIEffectBase.cs
@@ -37,7 +37,11 @@ public abstract class UIEffectBase : UIBehaviour, IMeshModifier, IMaterialModifi
 
         public Material effectMaterial => _material;
         public Graphic graphic => _graphic ? _graphic : _graphic = GetComponent<Graphic>();
+#if UNITY_6000_4_OR_NEWER
+        public virtual EntityId effectId => GetEntityId();
+#else
         public virtual uint effectId => (uint)GetInstanceID();
+#endif
         public virtual float actualSamplingScale => 1;
         public virtual bool canModifyShape => true;
 
@@ -188,8 +192,19 @@ public virtual Material GetModifiedMaterial(Material baseMaterial)
 
             Profiler.BeginSample("(UIE)[UIEffect] GetModifiedMaterial");
             var samplingScaleId = (uint)(Mathf.InverseLerp(0.01f, 100, actualSamplingScale) * uint.MaxValue);
-            var rootId = (uint)(transitionRoot ? transitionRoot.GetInstanceID() : 0);
-            var hash = new Hash128((uint)baseMaterial.GetInstanceID(), effectId, samplingScaleId, rootId);
+#if UNITY_6000_4_OR_NEWER
+            ulong matIdFull = EntityId.ToULong(baseMaterial.GetEntityId());
+            uint matId = (uint)(matIdFull ^ (matIdFull >> 32));
+            ulong rootIdFull = transitionRoot ? EntityId.ToULong(transitionRoot.GetEntityId()) : 0;
+            uint rootId = (uint)(rootIdFull ^ (rootIdFull >> 32));
+            ulong effIdFull = EntityId.ToULong(effectId);
+            uint effId = (uint)(effIdFull ^ (effIdFull >>32));
+            var hash = new Hash128(matId, effId, samplingScaleId, rootId);
+#else
+            uint matId = (uint)baseMaterial.GetInstanceID();
+            uint rootId = transitionRoot ? (uint)transitionRoot.GetInstanceID() : 0;
+            var hash = new Hash128(matId, effectId, samplingScaleId, rootId);
+#endif
             if (!MaterialRepository.Valid(hash, _material))
             {
                 Profiler.BeginSample("(UIE)[UIEffect] GetModifiedMaterial > Get or create material");
diff --git a/Packages/src/Runtime/UIEffectReplica.cs b/Packages/src/Runtime/UIEffectReplica.cs
index 9ae5dbb..c3347c8 100644
--- a/Packages/src/Runtime/UIEffectReplica.cs
+++ b/Packages/src/Runtime/UIEffectReplica.cs
@@ -1,4 +1,4 @@
-using System.Linq;
+using System.Linq;
 using Coffee.UIEffectInternal;
 using UnityEngine;
 
@@ -99,11 +99,19 @@ public bool allowToModifyMeshShape
 
         public override bool canModifyShape => m_AllowToModifyMeshShape;
 
+#if UNITY_6000_4_OR_NEWER
+        public override EntityId effectId => target
+            ? target.effectId
+            : preset
+                ? preset.GetEntityId()
+                : GetEntityId();
+#else
         public override uint effectId => target
             ? target.effectId
             : preset
                 ? (uint)preset.GetInstanceID()
                 : (uint)GetInstanceID();
+#endif
 
 
         public override UIEffectContext context