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+    - _EmissionMapColor: {r: 1, g: 1, b: 1, a: 1}
+    - _EmissionMapUVOffset: {r: 0, g: 0, b: 0, a: 0}
+    - _Fade: {r: 2, g: 4, b: 0, a: 0}
+    - _FresnelColor: {r: 1, g: 1, b: 1, a: 1}
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+    - _MainTex_Reverse_ST: {r: 1, g: 1, b: 0, a: 0}
+    - _MaskMap2GradientFloat0: {r: 0, g: 0, b: 1, a: 1}
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+    - _MaskMap2GradientFloat2: {r: 1, g: 0, b: 1, a: 1}
+    - _MaskMap3GradientFloat0: {r: 0, g: 0, b: 1, a: 1}
+    - _MaskMap3GradientFloat1: {r: 1, g: 0, b: 1, a: 1}
+    - _MaskMap3GradientFloat2: {r: 1, g: 0, b: 1, a: 1}
+    - _MaskMap3OffsetAnition: {r: 0, g: 0, b: 0, a: 0}
+    - _MaskMapGradientFloat0: {r: 0, g: 0, b: 1, a: 1}
+    - _MaskMapGradientFloat1: {r: 1, g: 0, b: 1, a: 1}
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+    - _NoiseOffset: {r: 0, g: 0, b: 0, a: 0}
+    - _PCCenter: {r: 0.5, g: 0.5, b: 1, a: 0}
+    - _ParallaxMapping_Vec: {r: 5, g: 30, b: 0, a: 0}
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+    - _VertexOffset_CustomDir: {r: 1, g: 1, b: 1, a: 0}
+    - _VertexOffset_MaskMap_Vec: {r: 0, g: 0, b: 1, a: 0}
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+  m_BuildTextureStacks: []
+  m_AllowLocking: 1
+--- !u!114 &8231681293324890184
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Assets/ThemeBundles/DepartureToMultiverse/Materials/Track/DTM_SpinTrails_Head.mat.meta

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Assets/ThemeBundles/DepartureToMultiverse/Prefabs/Environment/DTM_CircleSpinTrails.prefab.meta

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Assets/ThemeBundles/DepartureToMultiverse/Scripts/DataCore/Environment/DTMCircleSpinTrails_BM.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Collections.Generic;
+using Ichni.RhythmGame.Beatmap;
+using UnityEngine;
+
+namespace Ichni.RhythmGame.ThemeBundles.DepartureToMultiverse.Beatmap
+{
+    [System.Serializable]
+    public class DTMCircleSpinTrails_BM : EnvironmentObject_BM
+    {
+        // Circle Spin Trails Settings
+        public int particleCount = 20;
+        public float particleLifetime = 5f;
+        public Gradient colorGradient;
+        public float orbitalZSpeed = 1f;
+        public float emissionIntensity = 2f;
+
+        public DTMCircleSpinTrails_BM()
+        {
+        }
+
+        public DTMCircleSpinTrails_BM(
+            string elementName, Guid elementGuid, List<string> tags, GameElement_BM attachedElement,
+            string themeBundleName, string objectName, bool isStatic,
+            int particleCount, float particleLifetime, Gradient colorGradient,
+            float orbitalZSpeed, float emissionIntensity)
+            : base(elementName, elementGuid, tags, attachedElement, themeBundleName, objectName, isStatic)
+        {
+            this.particleCount = particleCount;
+            this.particleLifetime = particleLifetime;
+            this.colorGradient = colorGradient;
+            this.orbitalZSpeed = orbitalZSpeed;
+            this.emissionIntensity = emissionIntensity;
+        }
+
+        public override void ExecuteBM()
+        {
+            matchedElement = DTMCircleSpinTrails.GenerateElement(
+                elementName, elementGuid, tags, false,
+                themeBundleName, objectName, GetElement(attachedElementGuid), isStatic,
+                particleCount, particleLifetime, colorGradient, orbitalZSpeed, emissionIntensity);
+        }
+
+        public override GameElement DuplicateBM(GameElement parent)
+        {
+            return DTMCircleSpinTrails.GenerateElement(
+                elementName, Guid.NewGuid(), tags, true,
+                themeBundleName, objectName, parent, isStatic,
+                particleCount, particleLifetime, colorGradient, orbitalZSpeed, emissionIntensity);
+        }
+    }
+}

Assets/ThemeBundles/DepartureToMultiverse/Scripts/DataCore/Environment/DTMCircleSpinTrails_BM.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: fd6ac375b461e69478457b2e2d49de90

Assets/ThemeBundles/DepartureToMultiverse/Scripts/EditorCore/Environment/DTMCircleSpinTrails_Editor.cs

@@ -0,0 +1,54 @@
+using Ichni.Editor;
+using Ichni.RhythmGame.Beatmap;
+using Ichni.RhythmGame.ThemeBundles.DepartureToMultiverse.Beatmap;
+
+namespace Ichni.RhythmGame.ThemeBundles.DepartureToMultiverse
+{
+    public partial class DTMCircleSpinTrails
+    {
+        #region [Editor] Inspection & Save
+        public override void SaveBM()
+        {
+            matchedBM = new DTMCircleSpinTrails_BM(
+                elementName, elementGuid, tags,
+                parentElement.matchedBM as GameElement_BM,
+                themeBundleName, objectName, isStatic,
+                particleCount, particleLifetime, colorGradient, orbitalZSpeed, emissionIntensity);
+        }
+
+        public override void SetUpInspector()
+        {
+            base.SetUpInspector();
+
+            IHaveInspection insp = EditorManager.instance.uiManager.inspector;
+
+            InspectorBuilder.For(this)
+                .Section("Circle Spin Trails")
+                    .InputField(nameof(particleCount), "Particle Count")
+                        .OnChanged(ApplyParticleSettings)
+                    .Slider(nameof(particleLifetime), 0.1f, 20f, "Particle Lifetime")
+                        .OnChanged(ApplyParticleSettings)
+                    .Slider(nameof(orbitalZSpeed), -10f, 10f, "Orbital Z Speed")
+                        .OnChanged(ApplyParticleSettings)
+                    .Slider(nameof(emissionIntensity), 0f, 10f, "Emission Intensity")
+                        .OnChanged(ApplyParticleSettings)
+                .Section("Circle Spin Trails Color")
+                    .Button("Gradient Color Keys", () =>
+                    {
+                        var window = insp.GenerateCompositeParameterWindow(this, "Gradient Color Keys", nameof(colorGradient));
+                        window.SetAsGradientColorKeys();
+                        window.closeButton.onClick.AddListener(ApplyParticleSettings);
+                    })
+                    .Button("Gradient Alpha Keys", () =>
+                    {
+                        var window = insp.GenerateCompositeParameterWindow(this, "Gradient Alpha Keys", nameof(colorGradient));
+                        window.SetAsGradientAlphaKeys();
+                        window.closeButton.onClick.AddListener(ApplyParticleSettings);
+                    })
+                .Section("Circle Spin Trails Actions")
+                    .Button("Apply Settings", ApplyParticleSettings)
+                .Build();
+        }
+        #endregion
+    }
+}

Assets/ThemeBundles/DepartureToMultiverse/Scripts/EditorCore/Environment/DTMCircleSpinTrails_Editor.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 7902bc73b942a4f458cafc93892bae52

Assets/ThemeBundles/DepartureToMultiverse/Scripts/RuntimeCore/Environment/DTMCircleSpinTrails.cs

@@ -0,0 +1,173 @@
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Ichni.RhythmGame.ThemeBundles.DepartureToMultiverse
+{
+    /// <summary>
+    /// 圆形轨迹流星环境物体。单个 ParticleSystem，粒子沿 Velocity over Lifetime 的 Orbital Z 轨道旋转，
+    /// 并借助 Trail 模块拖出圆形轨迹。颜色由 Gradient 随机取色，发光强度以 HDR 倍率应用到粒子材质。
+    /// </summary>
+    public partial class DTMCircleSpinTrails : EnvironmentObject
+    {
+        #region [常量] Constants
+        private const string EnableEmissionProperty = "_EnableEmission";
+        private const string EmissionColorProperty = "_EmissionColor";
+        private const int DefaultParticleCount = 20;
+        private const float DefaultParticleLifetime = 5f;
+        private const float DefaultOrbitalZSpeed = 1f;
+        private const float DefaultEmissionIntensity = 2f;
+        private const float MinLifetime = 0.01f;
+        #endregion
+
+        #region [暴露属性字段] Exposed Fields
+        [Header("Core References")]
+        [Tooltip("流星效果所使用的粒子系统")]
+        public ParticleSystem trailParticleSystem;
+
+        [Header("Circle Spin Trails Settings")]
+        [Tooltip("同时存在的流星（粒子）数量")]
+        public int particleCount = DefaultParticleCount;
+
+        [Tooltip("单个粒子的存活时间（秒）")]
+        public float particleLifetime = DefaultParticleLifetime;
+
+        [Tooltip("粒子随机取色所使用的渐变")]
+        public Gradient colorGradient;
+
+        [Tooltip("轨道旋转速度（Velocity over Lifetime 的 Orbital Z）")]
+        public float orbitalZSpeed = DefaultOrbitalZSpeed;
+
+        [Tooltip("发光强度（HDR 倍率，应用到粒子材质的 _EmissionColor）")]
+        public float emissionIntensity = DefaultEmissionIntensity;
+        #endregion
+
+        #region [运行时缓存] Runtime Caches
+        private ParticleSystemRenderer particleRenderer;
+        #endregion
+
+        // 颜色由本元素的 Gradient 独立管理，因此不暴露 ColorSubmodule 的拾色器
+        public override bool haveBaseColor => false;
+        public override bool haveEmissionColor => false;
+
+        #region [默认值辅助] Default Helpers
+        /// <summary>返回默认的多彩渐变（青 → 品红 → 黄），用于流星随机取色。</summary>
+        private static Gradient DefaultColorGradient()
+        {
+            Gradient gradient = new Gradient();
+            gradient.SetKeys(
+                new GradientColorKey[]
+                {
+                    new GradientColorKey(Color.cyan, 0f),
+                    new GradientColorKey(Color.magenta, 0.5f),
+                    new GradientColorKey(Color.yellow, 1f)
+                },
+                new GradientAlphaKey[]
+                {
+                    new GradientAlphaKey(1f, 0f),
+                    new GradientAlphaKey(1f, 1f)
+                });
+            return gradient;
+        }
+        #endregion
+
+        #region [生命周期与工厂] Lifecycle & Factory
+        public static DTMCircleSpinTrails GenerateElement(
+            string elementName, Guid id, List<string> tags,
+            bool isFirstGenerated, string themeBundleName, string objectName,
+            GameElement parentElement, bool isStatic,
+            int particleCount, float particleLifetime, Gradient colorGradient,
+            float orbitalZSpeed, float emissionIntensity)
+        {
+            DTMCircleSpinTrails spinTrails = EnvironmentObject.GenerateElement(
+                    elementName, id, tags, isFirstGenerated,
+                    themeBundleName, objectName, parentElement, isStatic)
+                .GetComponent<DTMCircleSpinTrails>();
+
+            spinTrails.particleCount = particleCount;
+            spinTrails.particleLifetime = particleLifetime;
+            spinTrails.colorGradient = colorGradient ?? DefaultColorGradient();
+            spinTrails.orbitalZSpeed = orbitalZSpeed;
+            spinTrails.emissionIntensity = emissionIntensity;
+
+            return spinTrails;
+        }
+
+        public override void FirstSetUpObject(bool isFirstGenerated)
+        {
+            if (trailParticleSystem == null)
+                trailParticleSystem = GetComponent<ParticleSystem>();
+
+            particleRenderer = trailParticleSystem != null
+                ? trailParticleSystem.GetComponent<ParticleSystemRenderer>()
+                : null;
+
+            // 兼容旧存档中未序列化的渐变字段
+            if (colorGradient == null) colorGradient = DefaultColorGradient();
+
+            // 实例化材质，避免污染共享资源（从 AssetBundle 加载后必须重新初始化 Shader）
+            if (particleRenderer != null) particleRenderer.InitializeShader();
+
+            ApplyParticleSettings();
+        }
+
+        public override void AfterInitialize()
+        {
+            base.AfterInitialize();
+            ApplyParticleSettings();
+        }
+
+        public override void Refresh()
+        {
+            base.Refresh();
+            ApplyParticleSettings();
+        }
+
+        public override void OnDirtyRefresh(Dictionary<string, bool> flags)
+        {
+            ApplyParticleSettings();
+        }
+        #endregion
+
+        #region [粒子配置应用] Particle Settings
+        /// <summary>
+        /// 将当前字段配置写入粒子系统与材质：数量、存活时间、随机颜色、轨道旋转与发光强度。
+        /// </summary>
+        public void ApplyParticleSettings()
+        {
+            if (trailParticleSystem == null) return;
+
+            float safeLifetime = Mathf.Max(particleLifetime, MinLifetime);
+            int safeCount = Mathf.Max(particleCount, 0);
+
+            // 数量与存活时间：以 rateOverTime = count / lifetime 维持稳态粒子数量，maxParticles 作为硬上限
+            ParticleSystem.MainModule main = trailParticleSystem.main;
+            main.startLifetime = safeLifetime;
+            main.maxParticles = safeCount;
+            main.startColor = new ParticleSystem.MinMaxGradient(colorGradient)
+            {
+                mode = ParticleSystemGradientMode.RandomColor
+            };
+
+            ParticleSystem.EmissionModule emission = trailParticleSystem.emission;
+            emission.enabled = true;
+            emission.rateOverTime = new ParticleSystem.MinMaxCurve(safeCount / safeLifetime);
+
+            // 轨道旋转：Velocity over Lifetime 的 Orbital Z
+            ParticleSystem.VelocityOverLifetimeModule velocity = trailParticleSystem.velocityOverLifetime;
+            velocity.enabled = true;
+            velocity.orbitalZ = new ParticleSystem.MinMaxCurve(orbitalZSpeed);
+
+            // 发光强度：HDR 倍率写入材质 _EmissionColor（逐粒子随机色由顶点色再相乘着色）
+            if (particleRenderer != null && particleRenderer.material != null)
+            {
+                float hdrScale = Mathf.Pow(2f, emissionIntensity);
+                Color emissionColor = Color.white * hdrScale;
+                emissionColor.a = 1f;
+                particleRenderer.material.SetFloat(EnableEmissionProperty, 1f);
+                particleRenderer.material.SetColor(EmissionColorProperty, emissionColor);
+            }
+        }
+        #endregion
+    }
+}

Assets/ThemeBundles/DepartureToMultiverse/Scripts/RuntimeCore/Environment/DTMCircleSpinTrails.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 30fd0b949c7a57141a3320bac21f1e9e

Packages/com.bezi.sidekick/package.json

@@ -14,7 +14,7 @@
     "bezi3d"
   ],
   "unity": "2018.3",
-  "version": "0.92.1",
+  "version": "0.97.0",
   "type": "library",
   "hideInEditor": false,
   "dependencies": {