diff --git a/Assets/Portal/Runtime/RenderPortalCameras.cs b/Assets/Portal/Runtime/RenderPortalCameras.cs
index 1ec26ea..88bbfd3 100644
--- a/Assets/Portal/Runtime/RenderPortalCameras.cs
+++ b/Assets/Portal/Runtime/RenderPortalCameras.cs
@@ -81,8 +81,12 @@ namespace EscapeRoomEngine.Portal.Runtime
                             context.ExecuteCommandBuffer(_commandBuffer);
                             _commandBuffer.Clear();
                             
+                            // frustum culling
+                            camera.TryGetCullingParameters(true, out var cullingParameters);
+                            var cullingResults = context.Cull(ref cullingParameters);
+
                             // render the portal
-                            context.DrawRenderers(renderingData.cullResults, ref drawingSettings, ref filteringSettings, ref _renderStateBlock);
+                            context.DrawRenderers(cullingResults, ref drawingSettings, ref filteringSettings, ref _renderStateBlock);
 
                             // reset
                             RenderingUtils.SetViewAndProjectionMatrices(_commandBuffer, cameraData.GetViewMatrix(), cameraData.GetGPUProjectionMatrix(), false);
diff --git a/Assets/Scenes/StencilPortalScene.unity b/Assets/Scenes/StencilPortalScene.unity
index 3c02d20..3fea674 100644
--- a/Assets/Scenes/StencilPortalScene.unity
+++ b/Assets/Scenes/StencilPortalScene.unity
@@ -535,6 +535,16 @@ PrefabInstance:
       propertyPath: m_LocalEulerAnglesHint.y
       value: -180
       objectReference: {fileID: 0}
+    - target: {fileID: 6854256365856247454, guid: ecbf9ce952d5f38458b8237a4483c562,
+        type: 3}
+      propertyPath: m_ClearFlags
+      value: 1
+      objectReference: {fileID: 0}
+    - target: {fileID: 6854256365856247454, guid: ecbf9ce952d5f38458b8237a4483c562,
+        type: 3}
+      propertyPath: m_FocalLength
+      value: 9.492393
+      objectReference: {fileID: 0}
     m_RemovedComponents: []
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
@@ -823,7 +833,134 @@ MonoBehaviour:
   m_ShadowRenderingLayers: 1
   m_LightCookieSize: {x: 1, y: 1}
   m_LightCookieOffset: {x: 0, y: 0}
-  m_SoftShadowQuality: 2
+  m_SoftShadowQuality: 3
+--- !u!1 &517533142
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 517533143}
+  - component: {fileID: 517533146}
+  - component: {fileID: 517533144}
+  m_Layer: 0
+  m_Name: Camera
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 0
+--- !u!4 &517533143
+Transform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 517533142}
+  m_LocalRotation: {x: -0, y: -1, z: -0, w: -0.00000004470348}
+  m_LocalPosition: {x: -0, y: 1.159, z: 5.053}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
+  m_Children: []
+  m_Father: {fileID: 612192276}
+  m_RootOrder: -1
+  m_LocalEulerAnglesHint: {x: 0, y: -180, z: 0}
+--- !u!114 &517533144
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 517533142}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: a79441f348de89743a2939f4d699eac1, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  m_RenderShadows: 1
+  m_RequiresDepthTextureOption: 2
+  m_RequiresOpaqueTextureOption: 2
+  m_CameraType: 0
+  m_Cameras: []
+  m_RendererIndex: -1
+  m_VolumeLayerMask:
+    serializedVersion: 2
+    m_Bits: 1
+  m_VolumeTrigger: {fileID: 0}
+  m_VolumeFrameworkUpdateModeOption: 2
+  m_RenderPostProcessing: 0
+  m_Antialiasing: 0
+  m_AntialiasingQuality: 2
+  m_StopNaN: 0
+  m_Dithering: 0
+  m_ClearDepth: 1
+  m_AllowXRRendering: 1
+  m_UseScreenCoordOverride: 0
+  m_ScreenSizeOverride: {x: 0, y: 0, z: 0, w: 0}
+  m_ScreenCoordScaleBias: {x: 0, y: 0, z: 0, w: 0}
+  m_RequiresDepthTexture: 0
+  m_RequiresColorTexture: 0
+  m_Version: 2
+  m_TaaSettings:
+    quality: 3
+    frameInfluence: 0.1
+    jitterScale: 1
+    mipBias: 0
+    varianceClampScale: 0.9
+    contrastAdaptiveSharpening: 0
+--- !u!20 &517533146
+Camera:
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+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 517533142}
+  m_Enabled: 1
+  serializedVersion: 2
+  m_ClearFlags: 1
+  m_BackGroundColor: {r: 0.19215687, g: 0.3019608, b: 0.4745098, a: 0}
+  m_projectionMatrixMode: 1
+  m_GateFitMode: 2
+  m_FOVAxisMode: 0
+  m_Iso: 200
+  m_ShutterSpeed: 0.005
+  m_Aperture: 16
+  m_FocusDistance: 10
+  m_FocalLength: 50
+  m_BladeCount: 5
+  m_Curvature: {x: 2, y: 11}
+  m_BarrelClipping: 0.25
+  m_Anamorphism: 0
+  m_SensorSize: {x: 36, y: 24}
+  m_LensShift: {x: 0, y: 0}
+  m_NormalizedViewPortRect:
+    serializedVersion: 2
+    x: 0
+    y: 0
+    width: 1
+    height: 1
+  near clip plane: 0.3
+  far clip plane: 1000
+  field of view: 60
+  orthographic: 0
+  orthographic size: 5
+  m_Depth: 0
+  m_CullingMask:
+    serializedVersion: 2
+    m_Bits: 0
+  m_RenderingPath: -1
+  m_TargetTexture: {fileID: 0}
+  m_TargetDisplay: 0
+  m_TargetEye: 3
+  m_HDR: 1
+  m_AllowMSAA: 1
+  m_AllowDynamicResolution: 0
+  m_ForceIntoRT: 0
+  m_OcclusionCulling: 1
+  m_StereoConvergence: 10
+  m_StereoSeparation: 0.022
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 GameObject:
   m_ObjectHideFlags: 0
@@ -1021,6 +1158,7 @@ Transform:
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   - {fileID: 1933565652}
   - {fileID: 1453220877}
+  - {fileID: 517533143}
   m_Father: {fileID: 0}
   m_RootOrder: 4
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}