diff --git a/examples/matRenderTest.php b/examples/matRenderTest.php
index aca1058..ed46ef0 100644
--- a/examples/matRenderTest.php
+++ b/examples/matRenderTest.php
@@ -67,7 +67,6 @@ function createLuxcoreMat($matOriginal, $textureScaleU, $textureScaleV, $cacheFi
             return MatHelper::createMatOfDisney($matOriginal, $textureScaleU, $textureScaleV, $cacheFileDir, $scene);
         case 2:
             return MatHelper::createMatOfGlass($matOriginal, $textureScaleU, $textureScaleV, $cacheFileDir, $scene);
-            return;
         case 3:
             return;
         case 4:
diff --git a/examples/renderTest.php b/examples/renderTest.php
index 6c385eb..0015649 100644
--- a/examples/renderTest.php
+++ b/examples/renderTest.php
@@ -66,7 +66,7 @@ function createLuxcoreMat($matOriginal, $textureScaleU, $textureScaleV, $cacheFi
         case 1:
             return MatHelper::createMatOfDisney($matOriginal, $textureScaleU, $textureScaleV, $cacheFileDir, $scene);
         case 2:
-            return;
+            return MatHelper::createMatOfGlass($matOriginal, $textureScaleU, $textureScaleV, $cacheFileDir, $scene);
         case 3:
             return;
         case 4:
diff --git a/src/utils/MatHelper.php b/src/utils/MatHelper.php
index edd17b9..56ec9e2 100644
--- a/src/utils/MatHelper.php
+++ b/src/utils/MatHelper.php
@@ -296,6 +296,9 @@ class MatHelper{
             $material->setUroughness($roughnessTexture);
             $material->setVroughness($roughnessTexture);
         }
+
+        
+        return $material;
     }