diff --git a/Assets/6. Gradient/Materials/VolumeRendering4.mat b/Assets/6. Gradient/Materials/VolumeRendering4.mat
index 046f0cd..9b24bdf 100644
--- a/Assets/6. Gradient/Materials/VolumeRendering4.mat
+++ b/Assets/6. Gradient/Materials/VolumeRendering4.mat
@@ -24,26 +24,26 @@
         m_Scale: {x: 1, y: 1}
         m_Offset: {x: 0, y: 0}
     - _Volume:
-        m_Texture: {fileID: 4849145913767034428, guid: 69296e7051b1ebd42a278de0d58858fc,
+        m_Texture: {fileID: 4849145913767034428, guid: f2573a9deb19ec947aa0c8521b2ff5bf,
           type: 3}
         m_Scale: {x: 1, y: 1}
         m_Offset: {x: 0, y: 0}
     m_Floats:
     - _AlphaIntensity: 0.05
-    - _Ambient: 0.226
+    - _Ambient: 0
     - _BlendDst: 10
-    - _BlendSrc: 5
+    - _BlendSrc: 9
     - _ColorEnhance: 2.83
     - _ColorIntensity: 3
     - _Diffuse: 3.63
-    - _Intensity: 1
-    - _Iteration: 200
+    - _Intensity: 0.3
+    - _Iteration: 500
     - _MaxX: 1
-    - _MaxY: 0.886
+    - _MaxY: 0.768
     - _MaxZ: 1
     - _MinX: 0
     - _MinY: 0
     - _MinZ: 0
     - _RAY: 1
-    - _Shadow: 2.46
+    - _Shadow: 0.71
     m_Colors: []
diff --git a/Assets/6. Gradient/Scenes/Gradient.unity b/Assets/6. Gradient/Scenes/Gradient.unity
index 65295da..e82e60d 100644
--- a/Assets/6. Gradient/Scenes/Gradient.unity
+++ b/Assets/6. Gradient/Scenes/Gradient.unity
@@ -206,13 +206,13 @@
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 73477751}
-  m_LocalRotation: {x: 0.44802612, y: 0.5596352, z: -0.4529206, w: -0.5300414}
-  m_LocalPosition: {x: 0.11, y: 3.59, z: -0.02}
+  m_LocalRotation: {x: -0.25480404, y: -0.6607016, z: 0.11230456, w: -0.6970912}
+  m_LocalPosition: {x: -4.17, y: 1.43, z: -0.02}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_Children: []
   m_Father: {fileID: 0}
   m_RootOrder: 1
-  m_LocalEulerAnglesHint: {x: -358.166, y: -811.596, z: 2599.142}
+  m_LocalEulerAnglesHint: {x: -329.759, y: -1349.807, z: 4692.034}
 --- !u!1 &1873212973
 GameObject:
   m_ObjectHideFlags: 0
@@ -321,33 +321,33 @@
   m_EditorClassIdentifier: 
   gradient:
     serializedVersion: 2
-    key0: {r: 0.745283, g: 0.745283, b: 0.745283, a: 0}
-    key1: {r: 0.745283, g: 0.745283, b: 0.745283, a: 1}
-    key2: {r: 0.745283, g: 0.745283, b: 0.745283, a: 0.5882353}
-    key3: {r: 0.3897059, g: 1, b: 0.49492905, a: 1}
-    key4: {r: 1, g: 1, b: 1, a: 1}
+    key0: {r: 0, g: 0, b: 0, a: 0}
+    key1: {r: 0.10123711, g: 0.18569952, b: 0.23584908, a: 1}
+    key2: {r: 0.5566038, g: 0.1891897, b: 0.04463333, a: 0}
+    key3: {r: 0.86274517, g: 0.73333335, b: 1, a: 0.6901961}
+    key4: {r: 0.86274517, g: 0.73333335, b: 1, a: 0}
     key5: {r: 0, g: 0, b: 0, a: 1}
-    key6: {r: 0, g: 0, b: 0, a: 1}
+    key6: {r: 0, g: 0, b: 0, a: 0}
     key7: {r: 0, g: 0, b: 0, a: 1}
-    ctime0: 2900
-    ctime1: 15227
-    ctime2: 55127
-    ctime3: 31997
-    ctime4: 64957
+    ctime0: 0
+    ctime1: 36114
+    ctime2: 44341
+    ctime3: 50650
+    ctime4: 65535
     ctime5: 0
     ctime6: 0
     ctime7: 0
-    atime0: 1946
-    atime1: 2533
-    atime2: 11951
-    atime3: 33731
-    atime4: 24094
+    atime0: 33709
+    atime1: 36149
+    atime2: 40227
+    atime3: 43260
+    atime4: 52916
     atime5: 65535
-    atime6: 65535
+    atime6: 60655
     atime7: 65535
     m_Mode: 0
-    m_NumColorKeys: 2
-    m_NumAlphaKeys: 2
+    m_NumColorKeys: 5
+    m_NumAlphaKeys: 6
   updateTextureInEveryFrame: 1
 --- !u!1 &2108303124
 GameObject: