diff --git a/examples/print.php b/examples/print.php
index b83710c..a81f6da 100644
--- a/examples/print.php
+++ b/examples/print.php
@@ -61,33 +61,37 @@ echo $film;
 $scene = new Scene();//创建一个场景，
 
 
-$scene->materials[7] = new materials\Mix();     //在场景中创建一个编号为7的 Mix材质，
-$scene->materials[7]->material1 = 'wood1';      //指定混合材质的第一个材质为 wood1
-$scene->materials[7]->material2 = 'wood2';      //指定混合材质的第二个材质为 wood2
-$scene->materials[7]->amount = 0.6;     //指定混合系数为 0.6
 
-$scene->objects[0] = new Objects();     //在场景中创建一个编号为0的模型，
-$scene->objects[0]->material = 7;       //为模型指定编号为7的材质
-$scene->objects[0]->ply = 'mesh-00000.ply';     //为模型指定网格
-$scene->objects[0]->camerainvisible = false;        //是否对摄像机隐藏，
-$scene->objects[0]->id = 10086;     //为模型指定ID
-$scene->objects[0]->appliedtransformation = '1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1';      //设置模型的位值参数
+//添加第一个模型
+$mix = new materials\Mix();     //在场景中创建一个 Mix材质，
+$mix->material1 = 'wood1';      //指定混合材质的第一个材质为 wood1
+$mix->material2 = 'wood2';      //指定混合材质的第二个材质为 wood2
+$mix->amount = 0.6;     //指定混合系数为 0.6
 
+$obj = new Objects();     //创建一个的模型，
+$obj->material = $mix;       //为模型指定一个材质
+$obj->ply = 'mesh-00000.ply';     //为模型指定网格
+$obj->camerainvisible = false;        //是否对摄像机隐藏，
+$obj->id = 10086;     //为模型指定ID
+$obj->appliedtransformation = '1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1';      //设置模型的位值参数
 
+$scene->objects[] = $obj;   //将模型添加到场景中
 
 
-$scene->materials[8] = new materials\Metal();     //在场景中创建一个编号为8的 Metal材质，
-$scene->materials[8]->fresnel = "2517393611944Fresnel";     //指定金属材质菲列尔参数为一个颜色类型的贴图
 
-$scene->objects[1] = new Objects();     //在场景中创建一个编号为1的模型，
-$scene->objects[1]->material = 8;       //为模型指定编号为8的材质
-$scene->objects[1]->ply = 'mesh-119.ply';     //为模型指定网格
-$scene->objects[1]->camerainvisible = false;        //是否对摄像机隐藏，
-$scene->objects[1]->id = 911;     //为模型指定ID
-$scene->objects[1]->appliedtransformation = '1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1';      //设置模型的位值参数
+//添加第二个模型
+$metal = new materials\Metal();      //创建一个 金属 类型的材质
+$metal->fresnel = "2517393611944Fresnel";     //指定金属材质菲列尔参数为一个颜色类型的贴图
 
+$obj = new Objects();     //创建一个的模型，
+$obj->material = $metal;       //为模型指定一个材质
+$obj->ply = 'mesh-119.ply';     //为模型指定网格
+$obj->camerainvisible = false;        //是否对摄像机隐藏，
+$obj->appliedtransformation = '1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1';      //设置模型的位值参数
+
+$scene->objects[] = $obj;   //将模型添加到场景中
 
-echo $scene;
 
+echo $scene;
 
 ?>
diff --git a/src/scene/BaseCfg.php b/src/scene/BaseCfg.php
index c08a1c8..cd23be2 100644
--- a/src/scene/BaseCfg.php
+++ b/src/scene/BaseCfg.php
@@ -30,7 +30,7 @@ class BaseCfg extends Base
         $object = new \ReflectionClass($this);
         $properties = $object->getProperties();
 
-  
+        //echo '>>>>>>>>>>'."\n";
 
         //获取类名 -> 去除命名空间 -> 转成全小写
         $className = get_called_class();
@@ -74,7 +74,10 @@ class BaseCfg extends Base
                     break;
                 
                 case 'object':
-                    $ret .= $value->toString($className);
+                    if($name != 'conn' && $className != 'scene')
+                    {
+                        $ret .= $value->toString($className);
+                    }
                     break;
 
                 case 'NULL':
diff --git a/src/scene/Scene.php b/src/scene/Scene.php
index c5d91bc..be5d940 100644
--- a/src/scene/Scene.php
+++ b/src/scene/Scene.php
@@ -1,39 +1,47 @@
 <?php
 
 namespace Blobt\Luxcore\scene;
+use Blobt\Luxcore\scene\objects\Objects;
 
 class Scene extends BaseCfg
 {
 
+    public static $conn;
+
     /**
      * @var array 模型数组
      */
-    public $objects;
+    public $objects = [];
 
     /**
      * @var array 材质数组
      */
-    public $materials;
+    public $materials = [];
 
     /**
      * @var array 体积材质数组
      */
-    public $volumes;
+    public $volumes = [];
 
     /**
      * @var array 贴图数组
      */
-    public $textures;
+    public $textures = [];
 
     /**
      * @var array 灯光数组
      */
-    public $light;
+    public $light = [];
 
     /**
      * @var array 相机数组
      */
-    public $camera;
+    public $camera = [];
+
+    public function __construct()
+    {
+        self::$conn = $this;
+    }
 
 }
 
diff --git a/src/scene/materials/Disney.php b/src/scene/materials/Disney.php
index 5ea1e73..61cabe8 100644
--- a/src/scene/materials/Disney.php
+++ b/src/scene/materials/Disney.php
@@ -6,6 +6,8 @@ use Blobt\Luxcore\core\Base;
 class Disney extends MaterialsBase
 {
 
+    const TYPE_DISNEY = 'disney';
+
     /**
      * @var string 漫反射颜色，一个小数形式的RGB色值，或是一个textures（贴图数组）中的某个键名
      */
@@ -93,12 +95,12 @@ class Disney extends MaterialsBase
 
     public function __construct($config = [])
     {
-        $this->type = 'disney';
+        $this->type = self::TYPE_DISNEY;
         $this->emissionCfg = new Emission($config);
         $this->visibility = new Visibility($config);
         Base::__construct($config);
     }
-
+    
 }
 
 ?>
diff --git a/src/scene/materials/Glossy.php b/src/scene/materials/Glossy.php
index c738dc2..07e2bd4 100644
--- a/src/scene/materials/Glossy.php
+++ b/src/scene/materials/Glossy.php
@@ -6,6 +6,8 @@ use Blobt\Luxcore\core\Base;
 class Glossy extends MaterialsBase
 {
 
+    const TYPE_GLOSSY = 'glossy';
+
     /**
      * @var string 漫反射颜色，一个小数形式的RGB色值，或是一个textures（贴图数组）中的某个键名
      */
@@ -64,7 +66,7 @@ class Glossy extends MaterialsBase
 
     public function __construct($config = [])
     {
-        $this->type = 'glossy2';
+        $this->type = self::TYPE_GLOSSY;
         $this->emissionCfg = new Emission($config);
         $this->visibility = new Visibility($config);
         Base::__construct($config);
diff --git a/src/scene/materials/MaterialsBase.php b/src/scene/materials/MaterialsBase.php
index 97d76dd..7fdaaab 100644
--- a/src/scene/materials/MaterialsBase.php
+++ b/src/scene/materials/MaterialsBase.php
@@ -4,14 +4,19 @@ namespace Blobt\Luxcore\scene\materials;
 
 use Blobt\Luxcore\core\Base;
 use Blobt\Luxcore\scene\BaseCfg;
+use Blobt\Luxcore\scene\Scene;
+
+use function PHPSTORM_META\type;
 
 class MaterialsBase extends BaseCfg
 {
 
+    const TYPE_MATTE = 'matte';
+
     /**
      * @var string 材质类型
      */
-    public $type = "matte";
+    public $type = self::TYPE_MATTE;
 
     /**
      * @var string 此参数控制材质与光线作用时，产生阴影的透明度，或控制阴影的颜色(取值，小数形式的色值)
@@ -79,6 +84,13 @@ class MaterialsBase extends BaseCfg
      */
     public $volumeExterior;
 
+    public function __toString()
+    {
+        $temp = $this->type.'_'.sprintf("%09d",count(Scene::$conn->materials)+1);
+        Scene::$conn->materials[$temp] = $this;
+        return $temp;
+    }
+
 }
 
 ?>
diff --git a/src/scene/materials/Metal.php b/src/scene/materials/Metal.php
index 5df183a..0510335 100644
--- a/src/scene/materials/Metal.php
+++ b/src/scene/materials/Metal.php
@@ -6,6 +6,8 @@ use Blobt\Luxcore\core\Base;
 class Metal extends MaterialsBase
 {
 
+    const TYPE_METAL = 'matal';
+
     /**
      * @var string 菲列尔参数，一个textures（贴图数组）中的某个键名，只能是“fresnelconst（预设的菲列尔参数）”、
      *              “fresnelcolor（颜色的菲列尔）”两个类型的帖图。
@@ -39,7 +41,7 @@ class Metal extends MaterialsBase
 
     public function __construct($config = [])
     {
-        $this->type = 'metal2';
+        $this->type = self::TYPE_METAL;
         $this->emissionCfg = new Emission($config);
         $this->visibility = new Visibility($config);
         Base::__construct($config);
diff --git a/src/scene/materials/Mix.php b/src/scene/materials/Mix.php
index 7f1b035..19e8133 100644
--- a/src/scene/materials/Mix.php
+++ b/src/scene/materials/Mix.php
@@ -5,6 +5,7 @@ use Blobt\Luxcore\core\Base;
 
 class Mix extends MaterialsBase
 {
+    const TYPE_MIX = 'mix';
 
     /**
      * @var string 材质1，（材质数组的某个键名）
@@ -28,7 +29,7 @@ class Mix extends MaterialsBase
 
     public function __construct($config = [])
     {
-        $this->type = 'mix';
+        $this->type = self::TYPE_MIX;
         $this->emissionCfg = new Emission($config);
         $this->visibility = new Visibility($config);
         Base::__construct($config);
diff --git a/src/scene/materials/NullMaterial.php b/src/scene/materials/NullMaterial.php
index 028ab0f..84aa2d5 100644
--- a/src/scene/materials/NullMaterial.php
+++ b/src/scene/materials/NullMaterial.php
@@ -6,6 +6,8 @@ use Blobt\Luxcore\core\Base;
 class NullMaterial extends MaterialsBase
 {
 
+    const TYPE_NULL = 'null';
+
     /**
      * @var float 前向不透明度，一个0-1的小数，或是一个textures（贴图数组）中的某个键名
      */
@@ -23,7 +25,7 @@ class NullMaterial extends MaterialsBase
 
     public function __construct($config = [])
     {
-        $this->type = 'null';
+        $this->type = self::TYPE_NULL;
         $this->emissionCfg = new Emission($config);
         $this->visibility = new Visibility($config);
         Base::__construct($config);
diff --git a/src/scene/materials/Roughmatte.php b/src/scene/materials/Roughmatte.php
index 0ff327f..3d95f30 100644
--- a/src/scene/materials/Roughmatte.php
+++ b/src/scene/materials/Roughmatte.php
@@ -6,6 +6,8 @@ use Blobt\Luxcore\core\Base;
 class Roughmatte extends MaterialsBase
 {
 
+    const TYPE_ROUGHMATTE = 'roughmatte';
+
     /**
      * @var string 漫反射颜色，一个小数形式的RGB色值，或是一个textures（贴图数组）中的某个键名
      */
@@ -33,7 +35,7 @@ class Roughmatte extends MaterialsBase
 
     public function __construct($config = [])
     {
-        $this->type = 'roughmatte';
+        $this->type = self::TYPE_ROUGHMATTE;
         $this->emissionCfg = new Emission($config);
         $this->visibility = new Visibility($config);
         Base::__construct($config);
diff --git a/src/scene/objects/Objects.php b/src/scene/objects/Objects.php
index 83432b9..053e034 100644
--- a/src/scene/objects/Objects.php
+++ b/src/scene/objects/Objects.php
@@ -9,7 +9,7 @@ class Objects extends BaseCfg
     /**
      * @var string 对应的材质数组键名
      */
-    public $material;
+    public string $material;
 
     /**
      * @var string 对应的ply网格文件名称
@@ -31,6 +31,11 @@ class Objects extends BaseCfg
      */
     public $appliedtransformation;
 
+    public function __construct()
+    {
+        $this->id = rand(0,1000000);
+    }
+
 }
 
 ?>