diff --git a/src/utils/MatHelper.php b/src/utils/MatHelper.php
index 19aaf09..54f3641 100644
--- a/src/utils/MatHelper.php
+++ b/src/utils/MatHelper.php
@@ -31,7 +31,9 @@ class MatHelper{
         }
         if($matOriginal->matParams->isFilmEnabled === self::OPEN){
             $material->setFilmamount($matOriginal->matParams->film);
-            $material->setFilmthickness($matOriginal->matParams->filmthickness);
+            $material->setFilmthickness(
+                $matOriginal->matParams->filmthickness / 2
+            );
             $material->setFilmior($matOriginal->matParams->filmIor);
         }
         if($matOriginal->matParams->isSheenEnabled === self::OPEN){