diff --git a/examples/matRenderTest.php b/examples/matRenderTest.php
index 666f03c..907569f 100644
--- a/examples/matRenderTest.php
+++ b/examples/matRenderTest.php
@@ -19,6 +19,7 @@ use Blobt\Luxcore\scene\render\effect\ToneMapLinear;
 use Blobt\Luxcore\scene\render\FileSaver;
 use Blobt\Luxcore\scene\render\Film;
 use Blobt\Luxcore\scene\render\Filter;
+use Blobt\Luxcore\scene\render\HybridBackforWard;
 use Blobt\Luxcore\scene\render\Image;
 use Blobt\Luxcore\scene\render\LightStrategy;
 use Blobt\Luxcore\scene\render\Native;
@@ -191,8 +192,10 @@ $scene->registerCamera($camera);
 
 // $lightStrategy = new LightStrategy();
 // $render .= $lightStrategy;
-    
-// $path = new Path();
+
+// $hybridBackforWard = new HybridBackforWard();
+// $hybridBackforWard->partition = 1;
+// $path = new Path([],null,$hybridBackforWard);
 // $render .= $path;
 
 // $sampler = new Sampler();
@@ -222,7 +225,9 @@ $render .= $native;
 $lightStrategy = new LightStrategy();
 $render .= $lightStrategy;
     
-$path = new Path();
+$hybridBackforWard = new HybridBackforWard();
+$hybridBackforWard->partition = 0.8;
+$path = new Path([],null,$hybridBackforWard);
 $render .= $path;
 
 $sampler = new Sampler();
diff --git a/examples/renderTest.php b/examples/renderTest.php
index df1828d..c253a82 100644
--- a/examples/renderTest.php
+++ b/examples/renderTest.php
@@ -19,6 +19,7 @@ use Blobt\Luxcore\scene\render\effect\ToneMapLinear;
 use Blobt\Luxcore\scene\render\FileSaver;
 use Blobt\Luxcore\scene\render\Film;
 use Blobt\Luxcore\scene\render\Filter;
+use Blobt\Luxcore\scene\render\HybridBackforWard;
 use Blobt\Luxcore\scene\render\Image;
 use Blobt\Luxcore\scene\render\LightStrategy;
 use Blobt\Luxcore\scene\render\Native;
@@ -288,8 +289,10 @@ $render .= $openCL;
 
 $lightStrategy = new LightStrategy();
 $render .= $lightStrategy;
-    
-$path = new Path();
+
+$hybridBackforWard = new HybridBackforWard();
+$hybridBackforWard->partition = 1;
+$path = new Path([],null,$hybridBackforWard);
 $render .= $path;
 
 $sampler = new Sampler();
@@ -319,7 +322,9 @@ $render .= $sceneCfg;
 // $lightStrategy = new LightStrategy();
 // $render .= $lightStrategy;
     
-// $path = new Path();
+// $hybridBackforWard = new HybridBackforWard();
+// $hybridBackforWard->partition = 0.8;
+// $path = new Path([],null,$hybridBackforWard);
 // $render .= $path;
 
 // $sampler = new Sampler();
diff --git a/src/scene/render/Film.php b/src/scene/render/Film.php
index 9d6fe56..6a3404c 100644
--- a/src/scene/render/Film.php
+++ b/src/scene/render/Film.php
@@ -23,9 +23,9 @@ class Film extends BaseCfg
     public $openclEnable = true;
 
     /**
-     * @var integer TODO：具体作用尚不明确(取值：0)
+     * @var integer TODO：具体作用尚不明确(取值：2),使用cpu渲染时，这里必须取值为 2
      */
-    public $openclDevice = 0;
+    public $openclDevice = 2;
 
 
 
diff --git a/src/scene/render/HybridBackforWard.php b/src/scene/render/HybridBackforWard.php
index a625a8a..b99dbf4 100644
--- a/src/scene/render/HybridBackforWard.php
+++ b/src/scene/render/HybridBackforWard.php
@@ -12,14 +12,15 @@ class HybridBackforWard extends BaseCfg
     public $enable = self::OPEN;
 
     /**
-     * @var float 设置 不跟踪光线 所占最大百分比 （取值：0-1）
+     * @var float 在CPU上计算的光线量（GPU只能计算相机光线）。使用0%禁用灯光跟踪。使用100%意味着CPU只执行光线跟踪
+     *            gpu 渲染默认取值 1, cpu 渲染默认取值 0.8;
      */
     public $partition = 0;
 
     /**
      * @var float 设置区分图像的 平坦区域和非平坦区域 的阀值 （取值：0-1）
      */
-    public $glossinessthreshold = 0.05;
+    public $glossinessthreshold = 0.002;
 
 }