diff --git a/Runtime/Internal/Extensions/GraphicExtensions.cs b/Runtime/Internal/Extensions/GraphicExtensions.cs
deleted file mode 100644
index 1b0b23c..0000000
--- a/Runtime/Internal/Extensions/GraphicExtensions.cs
+++ /dev/null
@@ -1,125 +0,0 @@
-using System.Collections.Generic;
-using UnityEditor;
-using UnityEngine;
-using UnityEngine.Profiling;
-using UnityEngine.UI;
-
-namespace Coffee.UIParticleInternal
-{
-    /// <summary>
-    /// Extension methods for Graphic class.
-    /// </summary>
-    internal static class GraphicExtensions
-    {
-        private static readonly Vector3[] s_WorldCorners = new Vector3[4];
-        private static readonly Bounds s_ScreenBounds = new Bounds(new Vector3(0.5f, 0.5f, 0.5f), new Vector3(1, 1, 1));
-
-        /// <summary>
-        /// Check if a Graphic component is currently in the screen view.
-        /// </summary>
-        public static void GetMaterialsForRendering(this Graphic self, List<Material> result)
-        {
-            result.Clear();
-            if (!self) return;
-
-            var cr = self.canvasRenderer;
-            var count = cr.materialCount;
-            var popCount = cr.popMaterialCount;
-
-            if (result.Capacity < count + popCount)
-            {
-                result.Capacity = count + popCount;
-            }
-
-            for (var i = 0; i < count; i++)
-            {
-                result.Add(cr.GetMaterial(i));
-            }
-
-            for (var i = 0; i < popCount; i++)
-            {
-                result.Add(cr.GetPopMaterial(i));
-            }
-        }
-
-        /// <summary>
-        /// Check if a Graphic component is currently in the screen view.
-        /// </summary>
-        public static bool IsInScreen(this Graphic self)
-        {
-            if (!self || !self.canvas) return false;
-
-            if (FrameCache.TryGet(self, nameof(IsInScreen), out bool result))
-            {
-                return result;
-            }
-
-            Profiler.BeginSample("(COF)[GraphicExt] IsInScreen");
-            var cam = self.canvas.renderMode != RenderMode.ScreenSpaceOverlay
-                ? self.canvas.worldCamera
-                : null;
-            var min = new Vector3(float.MaxValue, float.MaxValue, float.MaxValue);
-            var max = new Vector3(float.MinValue, float.MinValue, float.MinValue);
-            self.rectTransform.GetWorldCorners(s_WorldCorners);
-            var screenSize = GetScreenSize();
-            for (var i = 0; i < 4; i++)
-            {
-                if (cam)
-                {
-                    s_WorldCorners[i] = cam.WorldToViewportPoint(s_WorldCorners[i]);
-                }
-                else
-                {
-                    s_WorldCorners[i] = RectTransformUtility.WorldToScreenPoint(null, s_WorldCorners[i]);
-                    s_WorldCorners[i].x /= screenSize.x;
-                    s_WorldCorners[i].y /= screenSize.y;
-                }
-
-                s_WorldCorners[i].z = 0;
-                min = Vector3.Min(s_WorldCorners[i], min);
-                max = Vector3.Max(s_WorldCorners[i], max);
-            }
-
-            var bounds = new Bounds(min, Vector3.zero);
-            bounds.Encapsulate(max);
-            result = bounds.Intersects(s_ScreenBounds);
-            FrameCache.Set(self, nameof(IsInScreen), result);
-            Profiler.EndSample();
-
-            return result;
-        }
-
-        /// <summary>
-        /// Get the actual main texture of a Graphic component.
-        /// </summary>
-        public static Texture GetActualMainTexture(this Graphic self)
-        {
-            var image = self as Image;
-            if (image == null) return self.mainTexture;
-
-            var sprite = image.overrideSprite;
-            return sprite ? sprite.GetActualTexture() : self.mainTexture;
-        }
-
-        private static Vector2Int GetScreenSize()
-        {
-#if UNITY_EDITOR
-            if (!Application.isPlaying && !Camera.current)
-            {
-                var res = UnityStats.screenRes.Split('x');
-                return new Vector2Int(int.Parse(res[0]), int.Parse(res[1]));
-            }
-#endif
-            return new Vector2Int(Screen.width, Screen.height);
-        }
-
-        public static float GetParentGroupAlpha(this Graphic self)
-        {
-            var alpha = self.canvasRenderer.GetAlpha();
-            if (Mathf.Approximately(alpha, 0)) return 1;
-
-            var inheritedAlpha = self.canvasRenderer.GetInheritedAlpha();
-            return Mathf.Clamp01(inheritedAlpha / alpha);
-        }
-    }
-}
diff --git a/Runtime/Internal/Extensions/GraphicExtensions.cs.meta b/Runtime/Internal/Extensions/GraphicExtensions.cs.meta
deleted file mode 100644
index 50b44d3..0000000
--- a/Runtime/Internal/Extensions/GraphicExtensions.cs.meta
+++ /dev/null
@@ -1,11 +0,0 @@
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-guid: 3803b037cd2ed45459dd660072f223dd
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-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
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