diff --git a/Assets/arts/textures/background/battle/bg_8.png b/Assets/arts/textures/background/battle/bg_8.png
index b3f97fead..6fd1bf08b 100644
Binary files a/Assets/arts/textures/background/battle/bg_8.png and b/Assets/arts/textures/background/battle/bg_8.png differ
diff --git a/Assets/arts/textures/background/battle/bg_8.png.meta b/Assets/arts/textures/background/battle/bg_8.png.meta
index 15028b1ef..93fb582db 100644
--- a/Assets/arts/textures/background/battle/bg_8.png.meta
+++ b/Assets/arts/textures/background/battle/bg_8.png.meta
@@ -79,7 +79,7 @@ TextureImporter:
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     maxTextureSize: 2048
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-    textureFormat: 47
+    textureFormat: 45
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     compressionQuality: 50
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diff --git a/Assets/arts/textures/background/battle/bg_9.png b/Assets/arts/textures/background/battle/bg_9.png
index 55282827d..32fd5cb54 100644
Binary files a/Assets/arts/textures/background/battle/bg_9.png and b/Assets/arts/textures/background/battle/bg_9.png differ
diff --git a/Assets/arts/textures/background/battle/bg_9.png.meta b/Assets/arts/textures/background/battle/bg_9.png.meta
index 33d49bbeb..13ec68eb3 100644
--- a/Assets/arts/textures/background/battle/bg_9.png.meta
+++ b/Assets/arts/textures/background/battle/bg_9.png.meta
@@ -79,7 +79,7 @@ TextureImporter:
     buildTarget: Android
     maxTextureSize: 2048
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-    textureFormat: 47
+    textureFormat: 45
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     compressionQuality: 50
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diff --git a/Assets/arts/textures/background/chapter/chapter_8.png b/Assets/arts/textures/background/chapter/chapter_8.png
index 7e57ab229..b94d30e9b 100644
Binary files a/Assets/arts/textures/background/chapter/chapter_8.png and b/Assets/arts/textures/background/chapter/chapter_8.png differ
diff --git a/Assets/arts/textures/background/chapter/chapter_9.png b/Assets/arts/textures/background/chapter/chapter_9.png
index ef8ea9aa3..c4193a723 100644
Binary files a/Assets/arts/textures/background/chapter/chapter_9.png and b/Assets/arts/textures/background/chapter/chapter_9.png differ