diff --git a/src/utils/MatHelper.php b/src/utils/MatHelper.php
index 746a137..c6fae71 100644
--- a/src/utils/MatHelper.php
+++ b/src/utils/MatHelper.php
@@ -8,6 +8,7 @@ use Blobt\Luxcore\scene\texture\procedural\ImageMap;
 use Blobt\Luxcore\scene\texture\transform\NormalMap;
 use GuzzleHttp\Client;
 use GuzzleHttp\RequestOptions;
+use Imagick;
 
 class MatHelper{
 
@@ -73,15 +74,23 @@ class MatHelper{
             $textureHandle = fopen($textureSavaPath, "w");
             (new Client())->get($textureUrl, [RequestOptions::SINK => $textureHandle]);
 
-            $metallicTexture = new ImageMap(
-                ['file' => $textureSavaPath]
+            $metalnessTextureSavaPath = $downloadDir.'metalness_'.basename($textureUrl);
+            $metalnessTexture = new Imagick($textureSavaPath);
+            $metalnessTexture->separateImageChannel(Imagick::CHANNEL_BLUE);
+            $metalnessTexture->writeImage($metalnessTextureSavaPath);
+            $metalnessTexture = new ImageMap(
+                ['file' => $metalnessTextureSavaPath]
             );
-            $metallicTexture->mapping = $mapping;
-            $scene->registerTexture($metallicTexture);
-            $material->setMetallic($metallicTexture);
-
+            $metalnessTexture->mapping = $mapping;
+            $scene->registerTexture($metalnessTexture);
+            $material->setMetallic($metalnessTexture);
+
+            $roughnessTextureSavaPath = $downloadDir.'roughness'.basename($textureUrl);
+            $roughnessTexture = new Imagick($textureSavaPath);
+            $roughnessTexture->separateImageChannel(Imagick::CHANNEL_BLUE);
+            $roughnessTexture->writeImage($roughnessTextureSavaPath);
             $roughnessTexture = new ImageMap(
-                ['file' => $textureSavaPath]
+                ['file' => $roughnessTextureSavaPath]
             );
             $roughnessTexture->mapping = $mapping;
             $scene->registerTexture($roughnessTexture);
@@ -106,7 +115,7 @@ class MatHelper{
             $material->setBumptex($normalTexture);
         }
 
-        //TODO： 更多通道贴图处理，待后续完善
+        //TODO： 更多贴图通道处理，待后续完善
 
         return $material;
     }