diff --git a/example/Vulkan/Deferred.cpp b/example/Vulkan/Deferred.cpp
index 741aa4ac..80b405f4 100644
--- a/example/Vulkan/Deferred.cpp
+++ b/example/Vulkan/Deferred.cpp
@@ -169,7 +169,7 @@ private:
         const VkFormat position_format  =FMT_RGBA16F;
         const VkFormat color_format     =FMT_RGBA16F;
         const VkFormat normal_format    =FMT_RGBA16F;
-        const VkFormat depth_format     =FMT_D16UN;
+        const VkFormat depth_format     =FMT_D32F;
 
         gbuffer.position=device->CreateAttachmentTextureColor(position_format,  gbuffer.extent.width,gbuffer.extent.height);
         gbuffer.color   =device->CreateAttachmentTextureColor(color_format,     gbuffer.extent.width,gbuffer.extent.height);
diff --git a/example/Vulkan/InlineGeometryScene.cpp b/example/Vulkan/InlineGeometryScene.cpp
index 81e12ac2..725f3edd 100644
--- a/example/Vulkan/InlineGeometryScene.cpp
+++ b/example/Vulkan/InlineGeometryScene.cpp
@@ -11,8 +11,8 @@
 using namespace hgl;
 using namespace hgl::graph;
 
-constexpr uint32_t SCREEN_WIDTH=128;
-constexpr uint32_t SCREEN_HEIGHT=128;
+constexpr uint32_t SCREEN_WIDTH=1280;
+constexpr uint32_t SCREEN_HEIGHT=720;
 
 class TestApp:public CameraAppFramework
 {
@@ -33,8 +33,7 @@ private:
                                 *ro_cone;
 
     vulkan::Pipeline            *pipeline_line      =nullptr,
-                                *pipeline_solid     =nullptr,
-                                *pipeline_twoside   =nullptr;
+                                *pipeline_solid     =nullptr;
 
 private:
 
@@ -156,22 +155,14 @@ private:
             return(false);
 
         db->Add(pipeline_solid);
-
-        pipeline_creater->SetCullMode(VK_CULL_MODE_NONE);
-        pipeline_twoside=pipeline_creater->Create();
-
-        if(!pipeline_twoside)
-            return(false);
-
-        db->Add(pipeline_twoside);
         return(true);
     }
 
     bool InitScene()
     {
         render_root.Add(db->CreateRenderableInstance(pipeline_line,descriptor_sets,ro_plane_grid));
-        //render_root.Add(db->CreateRenderableInstance(pipeline_twoside,descriptor_sets,ro_dome));
-        render_root.Add(db->CreateRenderableInstance(pipeline_twoside,descriptor_sets,ro_torus));
+        //render_root.Add(db->CreateRenderableInstance(pipeline_solid,descriptor_sets,ro_dome));
+        render_root.Add(db->CreateRenderableInstance(pipeline_solid,descriptor_sets,ro_torus));
         render_root.Add(db->CreateRenderableInstance(pipeline_solid,descriptor_sets,ro_cube     ),translate(-10,  0, 5)*scale(10,10,10));
         render_root.Add(db->CreateRenderableInstance(pipeline_solid,descriptor_sets,ro_sphere   ),translate( 10,  0, 5)*scale(10,10,10));
         render_root.Add(db->CreateRenderableInstance(pipeline_solid,descriptor_sets,ro_cylinder ),translate(  0, 16, 0));
diff --git a/example/Vulkan/VulkanAppFramework.h b/example/Vulkan/VulkanAppFramework.h
index e30bc386..e3a95b01 100644
--- a/example/Vulkan/VulkanAppFramework.h
+++ b/example/Vulkan/VulkanAppFramework.h
@@ -277,8 +277,8 @@ public:
         camera.height=h;
         camera.center.Set(0,0,0,1);
         camera.eye.Set(100,100,0,1);      //xyz三个值不要一样，以方便调试
-        camera.znear=-1;
-        camera.zfar=1;
+        camera.znear=0.01f;
+        camera.zfar=1024;
 
         camera.Refresh();      //更新矩阵计算
     }
diff --git a/inc/hgl/graph/Camera.h b/inc/hgl/graph/Camera.h
index d83e78e2..1a118916 100644
--- a/inc/hgl/graph/Camera.h
+++ b/inc/hgl/graph/Camera.h
@@ -39,7 +39,7 @@ namespace hgl
             float height;               ///<视图高
 
             float fov=60;               ///<水平FOV
-            float znear=-1,zfar=1;      ///<Z轴上离眼睛的距离
+            float znear=0.01,zfar=1024; ///<Z轴上离眼睛的距离
 
             Vector4f eye;               ///<眼睛坐标
             Vector4f center;            ///<视点坐标
diff --git a/inc/hgl/math/Matrix.h b/inc/hgl/math/Matrix.h
index 21bd3075..40072335 100644
--- a/inc/hgl/math/Matrix.h
+++ b/inc/hgl/math/Matrix.h
@@ -97,23 +97,6 @@ namespace hgl
             0.0f,               0.0f,   -1.0f,                  0.0f);
     }
 
-    /**
-     * 生成一个透视矩阵
-     * @param aspect_ratio 宽高比
-     * @param field_of_view 视野
-     */
-    inline Matrix4f perspective(float field_of_view,
-                                float aspect_ratio)
-    {
-        const float f = 1.0f / tan( hgl_ang2rad( 0.5f * field_of_view ) );
-
-        return Matrix4f(
-            f / aspect_ratio,   0.0f,   0.0f,   0.0f,
-            0.0f,               -f,     0.0f,   0.0f,
-            0.0f,               0.0f,   -1.0f,  0.0f,
-            0.0f,               0.0f,   -1.0f,  0.0f);
-    }
-
     inline Matrix4f translate(const Vector3f &v)
     {
         return Matrix4f::Translate(v);
diff --git a/src/SceneGraph/Camera.cpp b/src/SceneGraph/Camera.cpp
index fa6b6616..22356b16 100644
--- a/src/SceneGraph/Camera.cpp
+++ b/src/SceneGraph/Camera.cpp
@@ -19,7 +19,7 @@ namespace hgl
             Matrix4f result( side.x,         side.y,         side.z,            0.0f,
                              nup.x,          nup.y,          nup.z,             0.0f,
                             -forward.x,     -forward.y,     -forward.z/2.0f,    0.0f,
-                             0.0f,           0.0f,           0.5f,              1.0f);
+                             0.0f,           0.0f,           0.0f,              1.0f);
 
             return result*translate(-eye.xyz());
         }