chore(release): 4.12.2 [skip ci]

## [4.12.2](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.12.1...v4.12.2) (2026-06-08)

### Bug Fixes

* add `meshCleared` flag to optimize mesh clearing ([859fa20](859fa20d29))
* fix Unity6.5 compile errors and warnings ([a5ee687](a5ee687821)), closes [#400](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/400)
* potential access to UIParticleRenderer that has already been destroyed ([b740dd6](b740dd662d)), closes [#403](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/403)
* updated support for some changed menu paths ([f8ac986](f8ac9869f1)), closes [#397](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/397)

.github/CODEOWNERS

@@ -0,0 +1,6 @@
+# This is a comment.
+# Each line is a file pattern followed by one or more owners.
+# https://docs.github.com/ja/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
+
+# Default owners
+* @mob-sakai

.github/FUNDING.yml

@@ -0,0 +1,12 @@
+# These are supported funding model platforms
+
+github: mob-sakai # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: mob_sakai # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+otechie: # Replace with a single Otechie username
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,35 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: mob-sakai
+
+---
+
+NOTE: Your issue may already be reported! Please search on the [issue tracker](../) before creating one.
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Environment (please complete the following information):**
+ - Version [e.g. 1.0.0]
+ - Platform: [e.g. Editor(Windows/Mac), Standalone(Windows/Mac), iOS, Android, WebGL]
+ - Unity version: [e.g. 2018.2.8f1]
+ - Build options: [e.g. IL2CPP, .Net 4.x, LWRP]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,22 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: mob-sakai
+
+---
+
+NOTE: Your issue may already be reported! Please search on the [issue tracker](../) before creating one.
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,16 @@
+---
+name: Question
+about: Ask a question about this project
+title: ''
+labels: question
+assignees: mob-sakai
+
+---
+
+NOTE: Your issue may already be reported! Please search on the [issue tracker](../) before creating one.
+
+**Describe what help do you need**
+A description of the question.
+
+**Additional context**
+Add any other context or screenshots about the question here.

.github/pull_request_template.md

@@ -0,0 +1,37 @@
+
+# Pull Request Template
+
+## Description
+
+- Please include a summary of the change and which issue is fixed.
+- Please also include relevant motivation and context.
+- List any dependencies that are required for this change.
+
+Fixes #{issue_number}
+
+## Type of change
+
+Please write the commit message in the format corresponding to the change type.
+Please see [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/) for more information.
+
+- [ ] Bug fix (non-breaking change which fixes an issue)  
+- [ ] New feature (non-breaking change which adds functionality)  
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] Update documentations
+- [ ] Others (refactoring, style changes, etc.)
+
+## Test environment
+
+- Platform: [e.g. Editor(Windows/Mac), Standalone(Windows/Mac), iOS, Android, WebGL]
+- Unity version: [e.g. 2022.2.0f1]
+- Build options: [e.g. IL2CPP, .Net 4.x, URP/HDRP]
+
+## Checklist
+
+- [ ] This pull request is for merging into the `develop` branch
+- [ ] My code follows the style guidelines of this project
+- [ ] I have performed a self-review of my own code
+- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] I have made corresponding changes to the documentation
+- [ ] My changes generate no new warnings
+- [ ] I have checked my code and corrected any misspellings

.github/workflows/release.yml

@@ -27,10 +27,10 @@ jobs:
       split_to: ${{ steps.summary.outputs.split_to }}
     steps:
       - name: 🚚 Checkout (${{ github.ref_name }})
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: 🔖 Run semantic release
-        uses: cycjimmy/semantic-release-action@v5
+        uses: cycjimmy/semantic-release-action@v6
         id: release
         with:
           working_directory: Packages/src

.github/workflows/test.yml

@@ -7,9 +7,9 @@ run-name: 🧪 Test (${{ github.event.pull_request.title || github.ref_name }})
 
 env:
   # MINIMUM_VERSION: The minimum version of Unity.
-  MINIMUM_VERSION: 2019.4
+  MINIMUM_VERSION: 2020.3
   # EXCLUDE_FILTER: The excluded versions of Unity.
-  EXCLUDE_FILTER: "(2020.2.0|2021.1|2023.3)"
+  EXCLUDE_FILTER: "(2017|2018|2023.3)"
   PROJECT_PATH: .
 
 on:
@@ -46,9 +46,9 @@ jobs:
         id: setup
         run: |
           echo "==== Target Unity Versions ===="
-          LATEST_VERSIONS=`npx unity-changeset@latest list --versions --latest-patch --min ${MINIMUM_VERSION} --json --all`
+          LATEST_VERSIONS=`npx unity-changeset@latest list --versions --latest-patch --min ${MINIMUM_VERSION} --json --all --ignore-alpha`
           if [ "${{ inputs.usePeriodVersions }}" = "true" ]; then
-            ADDITIONAL_VERSIONS=`npx unity-changeset list --versions --grep '0f' --min ${MINIMUM_VERSION} --json`
+            ADDITIONAL_VERSIONS=`npx unity-changeset list --versions --grep '0f' --min ${MINIMUM_VERSION} --json --ignore-alpha`
           else
             ADDITIONAL_VERSIONS=[]
           fi
@@ -72,11 +72,11 @@ jobs:
     steps:
       - name: 🚚 Checkout ($${{ github.ref }})
         if: github.event_name == 'push'
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: 🚚 Checkout pull request (pull_request_target)
         if: github.event_name == 'pull_request_target'
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.event.pull_request.head.sha }}
           fetch-depth: 0
@@ -90,7 +90,7 @@ jobs:
           git log --oneline -n 10
 
       - name: 📥 Cache library
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ${{ env.PROJECT_PATH }}/Library
           key: ${{ env.PROJECT_PATH }}-Library-${{ matrix.unityVersion }}-${{ github.event.pull_request.head.sha || github.sha }}
@@ -99,7 +99,7 @@ jobs:
             ${{ env.PROJECT_PATH }}-Library-
 
       - name: 🛠️ Build Unity Project (Test)
-        uses: game-ci/unity-builder@main
+        uses: game-ci/unity-builder@v5
         timeout-minutes: 45
         with:
           customImage: ghcr.io/mob-sakai/unity3d:${{ matrix.unityVersion }}

Packages/src/CHANGELOG.md

@@ -1,3 +1,20 @@
+## [4.12.2](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.12.1...v4.12.2) (2026-06-08)
+
+
+### Bug Fixes
+
+* add `meshCleared` flag to optimize mesh clearing ([859fa20](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/859fa20d297c3f44e3361f20dbb7ce966407e03e))
+* fix Unity6.5 compile errors and warnings ([a5ee687](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/a5ee6878212be2fc4d7b48879426f239e8753009)), closes [#400](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/400)
+* potential access to UIParticleRenderer that has already been destroyed ([b740dd6](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/b740dd662d423c6bef849662ce1b0bfbb4940ed4)), closes [#403](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/403)
+* updated support for some changed menu paths ([f8ac986](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/f8ac9869f141238169730e74f5d65c4fc6081f51)), closes [#397](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/397)
+
+## [4.12.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.12.0...v4.12.1) (2026-03-24)
+
+
+### Bug Fixes
+
+* ignore "EditorOnly" tagged gameObjects on refresh ([031d46a](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/031d46a3216c942d2d1a6ccfadf5f0b9e3ce3006))
+
 # [4.12.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.11.4...v4.12.0) (2026-03-24)
 
 

Packages/src/Editor/AnimatablePropertyEditor.cs

@@ -78,10 +78,19 @@ namespace Coffee.UIExtensions
                 var mat = mats[j];
                 if (mat == null || mat.shader == null) continue;
 
+#if UNITY_6000_5_OR_NEWER
+                for (var i = 0; i < mat.shader.GetPropertyCount(); i++)
+#else
                 for (var i = 0; i < ShaderUtil.GetPropertyCount(mat.shader); i++)
+#endif
                 {
+#if UNITY_6000_5_OR_NEWER
+                    var name = mat.shader.GetPropertyName(i);
+                    var type = (AnimatableProperty.ShaderPropertyType)mat.shader.GetPropertyType(i);
+#else
                     var name = ShaderUtil.GetPropertyName(mat.shader, i);
                     var type = (AnimatableProperty.ShaderPropertyType)ShaderUtil.GetPropertyType(mat.shader, i);
+#endif
                     if (!s_Names.Add(name)) continue;
 
                     AddMenu(gm, sp, new ShaderProperty(name, type), true);

Packages/src/Editor/UIParticleMenu.cs

@@ -6,11 +6,22 @@ namespace Coffee.UIExtensions
 {
     internal class UIParticleMenu
     {
-        [MenuItem("GameObject/UI/Particle System (Empty)", false, 2018)]
+#if UNITY_6000_5_OR_NEWER
+        private const string k_MenuPathToCreateParticleSystem = "GameObject/Visual Effects/Particle System";
+#else
+        private const string k_MenuPathToCreateParticleSystem = "GameObject/Effects/Particle System";
+#endif
+#if UNITY_6000_3_OR_NEWER
+        private const string k_MenuPathForUgui = "GameObject/UI (Canvas)";
+#else
+        private const string k_MenuPathForUgui = "GameObject/UI";
+#endif
+
+        [MenuItem(k_MenuPathForUgui + "/Particle System (Empty)", false, 2018)]
         private static void AddParticleEmpty(MenuCommand menuCommand)
         {
             // Create empty UI element.
-            EditorApplication.ExecuteMenuItem("GameObject/UI/Image");
+            EditorApplication.ExecuteMenuItem(k_MenuPathForUgui + "/Image");
             var ui = Selection.activeGameObject;
             Object.DestroyImmediate(ui.GetComponent<Image>());
 
@@ -21,7 +32,7 @@ namespace Coffee.UIExtensions
             uiParticle.rectTransform.sizeDelta = Vector2.zero;
         }
 
-        [MenuItem("GameObject/UI/Particle System", false, 2019)]
+        [MenuItem(k_MenuPathForUgui + "/Particle System", false, 2019)]
         private static void AddParticle(MenuCommand menuCommand)
         {
             // Create empty UIEffect.
@@ -29,7 +40,7 @@ namespace Coffee.UIExtensions
             var uiParticle = Selection.activeGameObject.GetComponent<UIParticle>();
 
             // Create ParticleSystem.
-            EditorApplication.ExecuteMenuItem("GameObject/Effects/Particle System");
+            EditorApplication.ExecuteMenuItem(k_MenuPathToCreateParticleSystem);
             var ps = Selection.activeGameObject;
             ps.transform.SetParent(uiParticle.transform, false);
             ps.transform.localPosition = Vector3.zero;

Packages/src/Runtime/AnimatableProperty.cs

@@ -37,37 +37,17 @@ namespace Coffee.UIExtensions
             switch (type)
             {
                 case ShaderPropertyType.Color:
-                    var color = mpb.GetColor(id);
+                    material.SetColor(id, mpb.GetColor(id));
-                    if (color != default)
-                    {
-                        material.SetColor(id, color);
-                    }
-
                     break;
                 case ShaderPropertyType.Vector:
-                    var vector = mpb.GetVector(id);
+                    material.SetVector(id, mpb.GetVector(id));
-                    if (vector != default)
-                    {
-                        material.SetVector(id, vector);
-                    }
-
                     break;
                 case ShaderPropertyType.Float:
                 case ShaderPropertyType.Range:
-                    var value = mpb.GetFloat(id);
+                    material.SetFloat(id,  mpb.GetFloat(id));
-                    if (!Mathf.Approximately(value, 0))
-                    {
-                        material.SetFloat(id, value);
-                    }
-
                     break;
                 case ShaderPropertyType.Texture:
-                    var tex = mpb.GetTexture(id);
+                    material.SetTexture(id, mpb.GetTexture(id));
-                    if (tex != default(Texture))
-                    {
-                        material.SetTexture(id, tex);
-                    }
-
                     break;
             }
         }

Packages/src/Runtime/Internal/Extensions/ComponentExtensions.cs

@@ -184,7 +184,7 @@ namespace Coffee.UIParticleInternal
         /// <summary>
         /// Verify whether it can be converted to the specified component.
         /// </summary>
-            internal static bool CanConvertTo<T>(this Object context) where T : MonoBehaviour
+        internal static bool CanConvertTo<T>(this Object context) where T : MonoBehaviour
         {
             return context != null && context.GetType() != typeof(T);
         }

Packages/src/Runtime/Internal/ProjectSettings/PreloadedProjectSettings.cs

@@ -158,6 +158,8 @@ namespace Coffee.UIParticleInternal
 
         private void OnPlayModeStateChanged(PlayModeStateChange state)
         {
+            if (!this) return;
+
             switch (state)
             {
                 case PlayModeStateChange.ExitingEditMode:

Packages/src/Runtime/Internal/Utilities/Logger.cs

@@ -11,7 +11,7 @@ using Conditional = System.Diagnostics.ConditionalAttribute;
 
 namespace Coffee.UIParticleInternal
 {
-    internal static class Logging
+    internal static class Logger
     {
 #if !ENABLE_COFFEE_LOGGER
         private const string k_DisableSymbol = "DISABLE_COFFEE_LOGGER";

Packages/src/Runtime/Internal/Utilities/Logger.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 4f9f22bb079324476b1473030ad9fec3

Packages/src/Runtime/Internal/Utilities/Logging.cs.meta

@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: 8255313895da84e7cbdc876be3795334
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 

Packages/src/Runtime/Internal/Utilities/Misc.cs

@@ -20,7 +20,9 @@ namespace Coffee.UIParticleInternal
     {
         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>();

Packages/src/Runtime/Internal/Utilities/ObjectPool.cs

@@ -34,7 +34,7 @@ namespace Coffee.UIParticleInternal
             }
 
             // If there are no instances in the pool, create a new one.
-            Logging.Log(this, $"A new instance is created (pooled: {_pool.CountInactive}, created: {_pool.CountAll}).");
+            Logger.Log(this, $"A new instance is created (pooled: {_pool.CountInactive}, created: {_pool.CountAll}).");
             return _pool.Get();
         }
 
@@ -47,7 +47,7 @@ namespace Coffee.UIParticleInternal
             if (instance == null) return; // Ignore if already pooled or null.
 
             _pool.Release(instance);
-            Logging.Log(this, $"An instance is released (pooled: {_pool.CountInactive}, created: {_pool.CountAll}).");
+            Logger.Log(this, $"An instance is released (pooled: {_pool.CountInactive}, created: {_pool.CountAll}).");
             instance = default; // Set the reference to null.
         }
 #else
@@ -80,7 +80,7 @@ namespace Coffee.UIParticleInternal
             }
 
             // If there are no instances in the pool, create a new one.
-            Logging.Log(this, $"A new instance is created (pooled: {_pool.Count}, created: {++_count}).");
+            Logger.Log(this, $"A new instance is created (pooled: {_pool.Count}, created: {++_count}).");
             return _onCreate();
         }
 
@@ -94,7 +94,7 @@ namespace Coffee.UIParticleInternal
 
             _onReturn(instance); // Return the instance to the pool.
             _pool.Push(instance);
-            Logging.Log(this, $"An instance is released (pooled: {_pool.Count}, created: {_count}).");
+            Logger.Log(this, $"An instance is released (pooled: {_pool.Count}, created: {_count}).");
             instance = default; // Set the reference to null.
         }
 #endif

Packages/src/Runtime/Internal/Utilities/ObjectRepository.cs

@@ -103,7 +103,7 @@ namespace Coffee.UIParticleInternal
                     Release(ref obj);
                     ++entry.reference;
                     obj = entry.storedObject;
-                    Logging.Log(_name, $"Get(total#{count}): {entry}");
+                    Logger.Log(_name, $"Get(total#{count}): {entry}");
                 }
 
                 Profiler.EndSample();
@@ -130,8 +130,8 @@ namespace Coffee.UIParticleInternal
             newEntry.hash = hash;
             newEntry.reference = 1;
             _cache[hash] = newEntry;
-            _objectKey[newObject.GetInstanceID()] = hash;
+            _objectKey[newObject.GetHashCode()] = hash;
-            Logging.Log(_name, $"<color=#03c700>Add</color>(total#{count}): {newEntry}");
+            Logger.Log(_name, $"<color=#03c700>Add</color>(total#{count}): {newEntry}");
             Release(ref obj);
             obj = newObject;
             Profiler.EndSample();
@@ -146,7 +146,7 @@ namespace Coffee.UIParticleInternal
 
             // Find and release the entry.
             Profiler.BeginSample("(COF)[ObjectRepository] Release");
-            var id = obj.GetInstanceID();
+            var id = obj.GetHashCode();
             if (_objectKey.TryGetValue(id, out var hash)
                 && _cache.TryGetValue(hash, out var entry))
             {
@@ -157,12 +157,12 @@ namespace Coffee.UIParticleInternal
                 }
                 else
                 {
-                    Logging.Log(_name, $"Release(total#{_cache.Count}): {entry}");
+                    Logger.Log(_name, $"Release(total#{_cache.Count}): {entry}");
                 }
             }
             else
             {
-                Logging.Log(_name, $"Release(total#{_cache.Count}): <color=red>Already released: {obj}</color>");
+                Logger.Log(_name, $"Release(total#{_cache.Count}): <color=red>Already released: {obj}</color>");
             }
 
             obj = null;
@@ -175,10 +175,10 @@ namespace Coffee.UIParticleInternal
 
             Profiler.BeginSample("(COF)[ObjectRepository] Remove");
             _cache.Remove(entry.hash);
-            _objectKey.Remove(entry.storedObject.GetInstanceID());
+            _objectKey.Remove(entry.storedObject.GetHashCode());
             _pool.Push(entry);
             entry.reference = 0;
-            Logging.Log(_name, $"<color=#f29e03>Remove</color>(total#{_cache.Count}): {entry}");
+            Logger.Log(_name, $"<color=#f29e03>Remove</color>(total#{_cache.Count}): {entry}");
             entry.Release(_onRelease);
             Profiler.EndSample();
         }

Packages/src/Runtime/Internal/Utilities/UIExtraCallbacks.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Reflection;
 using UnityEditor;
 using UnityEngine;
 using UnityEngine.UI;
@@ -20,7 +21,7 @@ namespace Coffee.UIParticleInternal
         static UIExtraCallbacks()
         {
             Canvas.willRenderCanvases += OnBeforeCanvasRebuild;
-            Logging.LogMulticast(typeof(Canvas), "willRenderCanvases", message: "ctor");
+            Logger.LogMulticast(typeof(Canvas), "willRenderCanvases", message: "ctor");
         }
 
         /// <summary>
@@ -67,9 +68,17 @@ namespace Coffee.UIParticleInternal
             if (s_IsInitializedAfterCanvasRebuild) return;
             s_IsInitializedAfterCanvasRebuild = true;
 
+            // Explicitly set `Canvas.willRenderCanvases += CanvasUpdateRegistry.PerformUpdate`.
             CanvasUpdateRegistry.IsRebuildingLayout();
+#if TMP_ENABLE
+            // Explicitly set `Canvas.willRenderCanvases += TMP_UpdateManager.DoRebuilds`.
+            typeof(TMPro.TMP_UpdateManager)
+                .GetProperty("instance", BindingFlags.NonPublic | BindingFlags.Static)
+                .GetValue(null);
+#endif
+            Canvas.willRenderCanvases -= OnAfterCanvasRebuild;
             Canvas.willRenderCanvases += OnAfterCanvasRebuild;
-            Logging.LogMulticast(typeof(Canvas), "willRenderCanvases",
+            Logger.LogMulticast(typeof(Canvas), "willRenderCanvases",
                 message: "InitializeAfterCanvasRebuild");
         }
 

Packages/src/Runtime/UIParticle.cs

@@ -358,6 +358,7 @@ namespace Coffee.UIExtensions
 
             _isScaleStored = false;
             UIParticleUpdater.Unregister(this);
+            _renderers.RemoveAll(r => r == null);
             _renderers.ForEach(r => r.Reset());
             UnregisterDirtyMaterialCallback(UpdateRendererMaterial);
 
@@ -543,7 +544,9 @@ namespace Coffee.UIExtensions
             for (var i = particles.Count - 1; 0 <= i; i--)
             {
                 var ps = particles[i];
-                if (!ps || ps.GetComponentInParent<UIParticle>(true) != this)
+                if (!ps
+                    || ps.gameObject.CompareTag("EditorOnly") // Ignore "EditorOnly" tagged ParticleSystems.
+                    || ps.GetComponentInParent<UIParticle>(true) != this) // Ignore ParticleSystems that are not under this UIParticle.
                 {
                     particles.RemoveAt(i);
                 }

Packages/src/Runtime/UIParticleRenderer.cs

@@ -30,6 +30,7 @@ namespace Coffee.UIExtensions
         private int _index;
         private bool _isPrevStored;
         private bool _isTrail;
+        private bool _meshCleared;
         private Bounds _lastBounds;
         private Material _materialForRendering;
         private Material _modifiedMaterial;
@@ -205,9 +206,9 @@ namespace Coffee.UIExtensions
             }
 
             var hash = new Hash128(
-                modifiedMaterial ? (uint)modifiedMaterial.GetInstanceID() : 0,
+                modifiedMaterial ? (uint)modifiedMaterial.GetHashCode() : 0,
-                texture ? (uint)texture.GetInstanceID() : 0,
+                texture ? (uint)texture.GetHashCode() : 0,
-                0 < _parent.m_AnimatableProperties.Length ? (uint)GetInstanceID() : 0,
+                0 < _parent.m_AnimatableProperties.Length ? (uint)GetHashCode() : 0,
 #if UNITY_EDITOR
                 (uint)EditorJsonUtility.ToJson(modifiedMaterial).GetHashCode()
 #else
@@ -285,10 +286,14 @@ namespace Coffee.UIExtensions
                 || (_isTrail && !_particleSystem.trails.enabled) // Trail, but it is not enabled.
             )
             {
+                // Skip clearing the mesh if it's already cleared.
+                if (_meshCleared) return;
+
                 Profiler.BeginSample("[UIParticleRenderer] Clear Mesh");
                 workerMesh.Clear();
                 canvasRenderer.SetMesh(workerMesh);
                 _lastBounds = new Bounds();
+                _meshCleared = true;
                 Profiler.EndSample();
 
                 return;
@@ -312,6 +317,7 @@ namespace Coffee.UIExtensions
             //     customData.SetVector(ParticleSystemCustomData.Custom2, 3, 0);
             // }
 
+            _meshCleared = false;
             var main = _particleSystem.main;
             var scale = GetWorldScale();
             var psPos = _particleSystem.transform.position;

Packages/src/Runtime/Utilities/ParticleSystemExtensions.cs

@@ -92,7 +92,7 @@ namespace Coffee.UIParticleInternal
 
                 if (sortByMaterial)
                 {
-                    return aMat.GetInstanceID() - bMat.GetInstanceID();
+                    return aMat.GetHashCode() - bMat.GetHashCode();
                 }
 
                 if (aMat.renderQueue != bMat.renderQueue)
@@ -131,7 +131,7 @@ namespace Coffee.UIParticleInternal
         {
             for (var i = 0; i < list.Count; i++)
             {
-                if (list[i].GetInstanceID() == ps.GetInstanceID())
+                if (list[i].GetHashCode() == ps.GetHashCode())
                 {
                     return i;
                 }

Packages/src/package.json

@@ -2,7 +2,7 @@
   "name": "com.coffee.ui-particle",
   "displayName": "UI Particle",
   "description": "This package provides a component to render particle effects for uGUI.\nThe particle rendering is maskable and sortable, without the need for an extra Camera, RenderTexture, or Canvas.",
-  "version": "4.12.0",
+  "version": "4.12.2",
   "unity": "2018.2",
   "license": "MIT",
   "repository": {