chore(release): 4.13.1 [skip ci]

## [4.13.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.13.0...v4.13.1) (2026-06-26)

### Bug Fixes

* `ParticleSystemPreviewer` is no longer included in build ([bad976c](bad976cf01))
* add support for Unity 6.7 ([26fd3da](26fd3da20b)), closes [#408](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/408)

Packages/src/CHANGELOG.md

@@ -1,3 +1,11 @@
+## [4.13.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.13.0...v4.13.1) (2026-06-26)
+
+
+### Bug Fixes
+
+* `ParticleSystemPreviewer` is no longer included in build ([bad976c](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/bad976cf01180bdabf5cd2f1760e069afdcb644a))
+* add support for Unity 6.7 ([26fd3da](https://github.com/mob-sakai/ParticleEffectForUGUI/commit/26fd3da20b6b07f7a26df662358c53757a7cc5f5)), closes [#408](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/408)
+
 # [4.13.0](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v4.12.2...v4.13.0) (2026-06-25)
 
 

Packages/src/README.md

@@ -34,6 +34,7 @@ You can render, mask, and sort your `ParticleSystems` for UI without the need fo
   - [Usage with `Mask` or `RectMask2D` Component](#usage-with-mask-or-rectmask2d-component)
   - [Usage with Script](#usage-with-script)
   - [Component: UIParticleAttractor](#component-uiparticleattractor)
+  - [Component: ParticleSystemPreviewer](#component-particlesystempreviewer)
   - [Project Settings](#project-settings)
 - [🛠 Development Note](#-development-note)
   - [Compares the Baking mesh approach with the conventional approach](#compares-the-baking-mesh-approach-with-the-conventional-approach)
@@ -116,7 +117,7 @@ _This package requires **Unity 2018.3 or later**._
   ```
 - To update the package, use Package Manager UI (`Window > Package Manager`) or run the following command with `@{version}`:
   ```
-  openupm add com.coffee.ui-particle@4.9.0
+  openupm add com.coffee.ui-particle@4.13.0
   ```
 
 #### Install via UPM (with Package Manager UI)
@@ -125,7 +126,7 @@ _This package requires **Unity 2018.3 or later**._
 - Click `+ > Add package from git URL...` and input the repository URL: `https://github.com/mob-sakai/ParticleEffectForUGUI.git`  
   ![](https://github.com/user-attachments/assets/f88f47ad-c606-44bd-9e86-ee3f72eac548)
 - To update the package, change suffix `#{version}` to the target version.
-  - e.g. `https://github.com/mob-sakai/ParticleEffectForUGUI.git#4.9.0`
+  - e.g. `https://github.com/mob-sakai/ParticleEffectForUGUI.git#4.13.0`
 
 #### Install via UPM (Manually)
 
@@ -140,7 +141,7 @@ _This package requires **Unity 2018.3 or later**._
   ```
 
 - To update the package, change suffix `#{version}` to the target version.
-  - e.g. `"com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git#4.9.0",`
+  - e.g. `"com.coffee.ui-particle": "https://github.com/mob-sakai/ParticleEffectForUGUI.git#4.13.0",`
 
 #### Install as Embedded Package
 
@@ -271,16 +272,17 @@ uiParticle.Stop();
     - **Unscaled Time:** Update with unscaled delta time.
 - **OnAttracted**: An event called when attracting is complete (per particle).
 
-
 <br><br>
 
 ### Component: ParticleSystemPreviewer
 
-`ParticleSystemPreviewer` is used to preview a ParticleSystem in the editor.
+`ParticleSystemPreviewer` is used to preview a `ParticleSystem` in the editor.
+
+![](https://github.com/mob-sakai/mob-sakai/releases/download/docs/1782441157549.png)
 
 - When a `GameObject` with this component is selected in the editor, a temporary `ParticleSystem` is added if needed so you can preview the effect in the Scene view.
 - The generated `ParticleSystem` is marked with `HideFlags.DontSave`, so it is neither saved nor included in builds.
-
+- This component will be removed in builds.
 
 <br><br>
 

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

@@ -0,0 +1,153 @@
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace Coffee.UIParticleInternal
+{
+    internal static class MeshExtensions
+    {
+        internal static readonly InternalObjectPool<Mesh> s_MeshPool = new InternalObjectPool<Mesh>(
+            () =>
+            {
+                var mesh = new Mesh
+                {
+                    hideFlags = HideFlags.DontSave | HideFlags.NotEditable
+                };
+                mesh.MarkDynamic();
+                return mesh;
+            },
+            mesh => mesh,
+            mesh =>
+            {
+                if (mesh != null)
+                {
+                    mesh.Clear();
+                }
+            });
+
+        public static Mesh Rent()
+        {
+            return s_MeshPool.Rent();
+        }
+
+        public static void Return(ref Mesh mesh)
+        {
+            s_MeshPool.Return(ref mesh);
+        }
+
+        public static void CopyTo(this Mesh self, Mesh dst)
+        {
+            if (self == null || dst == null) return;
+
+            var vector3List = InternalListPool<Vector3>.Rent();
+            var vector4List = InternalListPool<Vector4>.Rent();
+            var color32List = InternalListPool<Color32>.Rent();
+            var intList = InternalListPool<int>.Rent();
+
+            dst.Clear(false);
+
+            self.GetVertices(vector3List);
+            dst.SetVertices(vector3List);
+
+            self.GetTriangles(intList, 0);
+            dst.SetTriangles(intList, 0);
+
+            self.GetNormals(vector3List);
+            dst.SetNormals(vector3List);
+
+            self.GetTangents(vector4List);
+            dst.SetTangents(vector4List);
+
+            self.GetColors(color32List);
+            dst.SetColors(color32List);
+
+            self.GetUVs(0, vector4List);
+            dst.SetUVs(0, vector4List);
+
+            self.GetUVs(1, vector4List);
+            dst.SetUVs(1, vector4List);
+
+            self.GetUVs(2, vector4List);
+            dst.SetUVs(2, vector4List);
+
+            self.GetUVs(3, vector4List);
+            dst.SetUVs(3, vector4List);
+
+            dst.RecalculateBounds();
+            InternalListPool<Vector3>.Return(ref vector3List);
+            InternalListPool<Vector4>.Return(ref vector4List);
+            InternalListPool<Color32>.Return(ref color32List);
+            InternalListPool<int>.Return(ref intList);
+        }
+
+        public static void CopyTo(this VertexHelper self, Mesh dst)
+        {
+            if (self == null || dst == null) return;
+
+            self.FillMesh(dst);
+        }
+
+        public static void CopyTo(this Mesh self, VertexHelper dst)
+        {
+            if (self == null || dst == null) return;
+
+            var vertexCount = self.vertexCount;
+            var indexCount = self.triangles.Length;
+            self.CopyTo(dst, vertexCount, indexCount);
+        }
+
+        public static void CopyTo(this Mesh self, VertexHelper dst, int vertexCount, int indexCount)
+        {
+            if (self == null || dst == null) return;
+
+            var positions = InternalListPool<Vector3>.Rent();
+            var normals = InternalListPool<Vector3>.Rent();
+            var uv0 = InternalListPool<Vector4>.Rent();
+            var uv1 = InternalListPool<Vector4>.Rent();
+            var uv2 = InternalListPool<Vector4>.Rent();
+            var uv3 = InternalListPool<Vector4>.Rent();
+            var tangents = InternalListPool<Vector4>.Rent();
+            var colors = InternalListPool<Color32>.Rent();
+            var indices = InternalListPool<int>.Rent();
+            self.GetVertices(positions);
+            self.GetColors(colors);
+            self.GetUVs(0, uv0);
+            self.GetUVs(1, uv1);
+            self.GetUVs(2, uv1);
+            self.GetUVs(3, uv1);
+            self.GetNormals(normals);
+            self.GetTangents(tangents);
+            self.GetIndices(indices, 0);
+
+            dst.Clear();
+            for (var i = 0; i < vertexCount; i++)
+            {
+                dst.AddVert(positions.GetOrDefault(i), colors.GetOrDefault(i), uv0.GetOrDefault(i), uv1.GetOrDefault(i),
+                    uv2.GetOrDefault(i), uv3.GetOrDefault(i), normals.GetOrDefault(i), tangents.GetOrDefault(i));
+            }
+
+            var count = Mathf.Clamp(indexCount, 0, indices.Count);
+            for (var i = 0; i < count - 2; i += 3)
+            {
+                dst.AddTriangle(indices[i], indices[i + 1], indices[i + 2]);
+            }
+
+            InternalListPool<Vector3>.Return(ref positions);
+            InternalListPool<Vector3>.Return(ref normals);
+            InternalListPool<Vector4>.Return(ref uv0);
+            InternalListPool<Vector4>.Return(ref uv1);
+            InternalListPool<Vector4>.Return(ref uv2);
+            InternalListPool<Vector4>.Return(ref uv3);
+            InternalListPool<Vector4>.Return(ref tangents);
+            InternalListPool<Color32>.Return(ref colors);
+            InternalListPool<int>.Return(ref indices);
+        }
+
+        private static T GetOrDefault<T>(this List<T> self, int index)
+        {
+            return 0 <= index && index < self.Count
+                ? self[index]
+                : default;
+        }
+    }
+}

Packages/src/Runtime/Internal/Extensions/MeshExtensions.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 8c949d47f5c6d4d22bd7baebc60d48f3
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/src/Runtime/ParticleSystemPreviewer.cs

@@ -1,3 +1,4 @@
+#if UNITY_EDITOR
 using System.Collections.Generic;
 using System.Linq;
 using Coffee.UIParticleInternal;
@@ -13,7 +14,6 @@ namespace Coffee.UIExtensions
         // Do nothing.
     }
 
-#if UNITY_EDITOR
     [CustomEditor(typeof(ParticleSystemPreviewer))]
     [CanEditMultipleObjects]
     internal class ParticleSystemPreviewerEditor : Editor
@@ -29,6 +29,7 @@ namespace Coffee.UIExtensions
         public override void OnInspectorGUI()
         {
             base.OnInspectorGUI();
+            EditorGUILayout.HelpBox("ParticleSystemPreviewer will be removed in build.", MessageType.Warning);
             ParticleSystemPreviewSystem.DrawWarningForTemporary(_gameObjects);
             ParticleSystemPreviewSystem.DrawWarningForPermanent(_gameObjects);
         }
@@ -43,6 +44,12 @@ namespace Coffee.UIExtensions
     {
         private const HideFlags k_TemporaryHideFlags = HideFlags.DontSave | HideFlags.NotEditable;
 
+        private const string k_TemporaryMesssage = "The temporary ParticleSystem for preview is attached.\n" +
+                                                   "It will be removed when exiting edit mode.";
+
+        private const string k_PermanentMesssage = "The permanent ParticleSystem is attached.\n" +
+                                                   "It will be included in build.";
+
         [SerializeField]
         private List<GameObject> m_PreviewObjects = new List<GameObject>();
 
@@ -192,8 +199,7 @@ namespace Coffee.UIExtensions
         {
             if (gameObjects == null || gameObjects.Length == 0 || !gameObjects.Any(HasTemporaryParticleSystem)) return;
 
-            if (WarningButton("The temporary ParticleSystem for preview is attached.\n" +
+            if (HelpBoxButton(MessageType.Warning, k_TemporaryMesssage, "Remove"))
-                              "It will be removed when exiting edit mode.", "Remove"))
             {
                 foreach (var go in gameObjects)
                 {
@@ -209,8 +215,7 @@ namespace Coffee.UIExtensions
         {
             if (gameObjects == null || gameObjects.Length == 0 || !gameObjects.Any(HasPermanentParticleSystem)) return;
 
-            if (WarningButton("The permanent ParticleSystem is attached.\n" +
+            if (HelpBoxButton(MessageType.Info, k_PermanentMesssage, "Remove"))
-                              "It will be included in build.", "Remove"))
             {
                 foreach (var go in gameObjects)
                 {
@@ -224,14 +229,14 @@ namespace Coffee.UIExtensions
             }
         }
 
-        private static bool WarningButton(string message, string buttonText)
+        private static bool HelpBoxButton(MessageType messageType, string message, string buttonText)
         {
             EditorGUILayout.BeginHorizontal();
-            EditorGUILayout.HelpBox(message, MessageType.Warning, true);
+            EditorGUILayout.HelpBox(message, messageType, true);
             var clicked = GUILayout.Button(EditorGUIUtility.TrTempContent(buttonText));
             EditorGUILayout.EndHorizontal();
             return clicked;
         }
     }
-#endif
 }
+#endif

Packages/src/Runtime/UIParticleRenderer.cs

@@ -26,6 +26,7 @@ namespace Coffee.UIExtensions
         private static readonly List<Material> s_Materials = new List<Material>(2);
         private static MaterialPropertyBlock s_Mpb;
         private static readonly Vector3[] s_Corners = new Vector3[4];
+        private static readonly VertexHelper s_VertexHelper = new VertexHelper();
         private bool _delay;
         private int _index;
         private bool _isPrevStored;
@@ -451,11 +452,15 @@ namespace Coffee.UIExtensions
 
                 var components = InternalListPool<Component>.Rent();
                 GetComponents(typeof(IMeshModifier), components);
+                if (0 < components.Count)
+                {
+                    workerMesh.CopyTo(s_VertexHelper);
                     for (var i = 0; i < components.Count; i++)
                     {
-#pragma warning disable CS0618 // Type or member is obsolete
+                        ((IMeshModifier)components[i]).ModifyMesh(s_VertexHelper);
-                    ((IMeshModifier)components[i]).ModifyMesh(workerMesh);
+                    }
-#pragma warning restore CS0618 // Type or member is obsolete
+
+                    s_VertexHelper.FillMesh(workerMesh);
                 }
 
                 InternalListPool<Component>.Return(ref components);

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": "4.13.0",
+  "version": "4.13.1",
   "unity": "2018.2",
   "license": "MIT",
   "repository": {