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diff --git a/Assets/occlusion-portals/prefabs/double-door/TriggerDoor.asset.meta b/Assets/occlusion-portals/prefabs/double-door/TriggerDoor.asset.meta
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diff --git a/Assets/occlusion-portals/prefabs/double-door/TriggerDoor.cs b/Assets/occlusion-portals/prefabs/double-door/TriggerDoor.cs
new file mode 100644
index 0000000..b55f83a
--- /dev/null
+++ b/Assets/occlusion-portals/prefabs/double-door/TriggerDoor.cs
@@ -0,0 +1,96 @@
+using UdonSharp;
+using UnityEngine;
+using VRC.SDKBase;
+
+public class TriggerDoor : UdonSharpBehaviour
+{
+    private const string MagicWord = "fuck";
+    [Tooltip("Put your \"Door\" object with animator component here")]
+    public Animator animator;
+    [Tooltip("\"Door's\" sounds source")]
+    public AudioSource audioSource;
+    [Tooltip("Sound when opening")]
+    public AudioClip openSound;
+    [Tooltip("Sound when closing")]
+    public AudioClip closingSound;
+    [Tooltip("Start state of the \"Door\" (parameter \'isOpen\' in controller)")]
+    public bool isOpen = false;
+
+    [UdonSynced]
+    private byte _counter = 0;
+    [UdonSynced]
+    private string _tagName;
+
+    public override void OnPlayerTriggerEnter(VRCPlayerApi player)
+    {
+        if (player.IsValid())
+        {
+            player.SetPlayerTag(_tagName, MagicWord);
+        }
+        SetDoorState(true);
+        _counter++;
+    }
+
+    public override void OnPlayerTriggerExit(VRCPlayerApi player)
+    {
+        if (player.IsValid())
+        {
+            player.SetPlayerTag(_tagName);
+        }
+
+        if (_counter - 1 <= 0)
+        {
+            SetDoorState(false);
+            _counter = 0;
+        }
+        else
+        {
+            _counter--;
+        }
+    }
+
+    /// <summary>
+    /// A fucking workaround for a fucking OnPlayerTriggerExit() event not firing on player exiting a game
+    /// while inside a trigger volume
+    /// </summary>
+    public override void OnPlayerLeft(VRCPlayerApi player)
+    {
+        if (player.GetPlayerTag(_tagName) == MagicWord)
+        {
+            OnPlayerTriggerExit(player);
+        }
+    }
+
+    void Start()
+    {
+        _tagName = $"InTrigger{GetInstanceID()}";
+        SetAnimatorValue(isOpen);
+    }
+
+    private void SetDoorState(bool open)
+    {
+        if (open == isOpen)
+            return;
+        PlaySound(open);
+        SetAnimatorValue(open);
+        isOpen = open;
+    }
+
+    private void PlaySound(bool open)
+    {
+        if (audioSource == null || openSound == null || closingSound == null)
+            return;
+
+        audioSource.clip = open ? openSound : closingSound;
+
+        if (!audioSource.isPlaying)
+        {
+            audioSource.Play();
+        }
+    }
+
+    private void SetAnimatorValue(bool value)
+    {
+        animator.SetBool("isOpen", value);
+    }
+}
diff --git a/Assets/occlusion-portals/prefabs/double-door/TriggerDoor.cs.meta b/Assets/occlusion-portals/prefabs/double-door/TriggerDoor.cs.meta
new file mode 100644
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diff --git a/Assets/occlusion-portals/prefabs/double-door/blend~/double-door.blend b/Assets/occlusion-portals/prefabs/double-door/blend~/double-door.blend
new file mode 100644
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+++ b/Assets/occlusion-portals/prefabs/double-door/blend~/double-door.blend
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new file mode 100644
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+				Type: "LayerElementUV"
+				TypedIndex: 0
+			}
+			LayerElement:  {
+				Type: "LayerElementTexture"
+				TypedIndex: 0
+			}
+			LayerElement:  {
+				Type: "LayerElementMaterial"
+				TypedIndex: 0
+			}
+		}
+	}
+	Material: "Material::dev_measuredoor01", "" {
+		Version: 102
+		ShadingModel: "lambert"
+		MultiLayer: 0
+		Properties60:  {
+			Property: "ShadingModel", "KString", "", "Lambert"
+			Property: "MultiLayer", "bool", "",0
+			Property: "EmissiveColor", "ColorRGB", "",0.8000,0.8000,0.8000
+			Property: "EmissiveFactor", "double", "",0.0000
+			Property: "AmbientColor", "ColorRGB", "",1.0000,1.0000,1.0000
+			Property: "AmbientFactor", "double", "",1.0000
+			Property: "DiffuseColor", "ColorRGB", "",0.8000,0.8000,0.8000
+			Property: "DiffuseFactor", "double", "",0.8000
+			Property: "Bump", "Vector3D", "",0,0,0
+			Property: "TransparentColor", "ColorRGB", "",1,1,1
+			Property: "TransparencyFactor", "double", "",0.0000
+			Property: "SpecularColor", "ColorRGB", "",1.0000,1.0000,1.0000
+			Property: "SpecularFactor", "double", "",0.5000
+			Property: "ShininessExponent", "double", "",12.3
+			Property: "ReflectionColor", "ColorRGB", "",0,0,0
+			Property: "ReflectionFactor", "double", "",1
+			Property: "Emissive", "ColorRGB", "",0,0,0
+			Property: "Ambient", "ColorRGB", "",1.0,1.0,1.0
+			Property: "Diffuse", "ColorRGB", "",0.8,0.8,0.8
+			Property: "Specular", "ColorRGB", "",1.0,1.0,1.0
+			Property: "Shininess", "double", "",12.3
+			Property: "Opacity", "double", "",1.0
+			Property: "Reflectivity", "double", "",0
+		}
+	}
+	GroupSelection: "GroupSelection::double-door", "Default" {
+		Properties60:  {
+			Property: "MultiLayer", "bool", "",0
+			Property: "Pickable", "bool", "",1
+			Property: "Transformable", "bool", "",1
+			Property: "Show", "bool", "",1
+		}
+		MultiLayer: 0
+	}
+	Pose: "Pose::BIND_POSES", "BindPose" {
+		Type: "BindPose"
+		Version: 100
+		Properties60:  {
+		}
+		NbPoseNodes: 5
+		PoseNode:  {
+			Node: "Model::door-hinge-left"
+			Matrix: 1.000000000000000,0.000000000000000,0.000000000000000,0.000000000000000,0.000000000000000,0.000000000000000,-1.000000000000000,0.000000000000000,0.000000000000000,1.000000000000000,0.000000000000000,0.000000000000000,0.000000000000000,0.000000000000000,0.000000000000000,1.000000000000000
+		}
+		PoseNode:  {
+			Node: "Model::door-hinge-right"
+			Matrix: 1.000000000000000,0.000000000000000,0.000000000000000,0.000000000000000,0.000000000000000,0.000000000000000,-1.000000000000000,0.000000000000000,0.000000000000000,1.000000000000000,0.000000000000000,0.000000000000000,0.000000000000000,0.000000000000000,0.000000000000000,1.000000000000000
+		}
+		PoseNode:  {
+			Node: "Model::door-frame"
+			Matrix: 0.000000075497901,0.000000000000000,-1.000000000000000,0.000000000000000,-1.000000000000000,0.000000000000000,-0.000000075497901,0.000000000000000,0.000000000000000,1.000000000000000,0.000000000000000,0.000000000000000,0.000000000000000,1.399999976158142,0.000000000000000,1.000000000000000
+		}
+		PoseNode:  {
+			Node: "Model::door-left"
+			Matrix: 0.000000075497901,0.000000000000000,-1.000000000000000,0.000000000000000,-1.000000000000000,0.000000000000000,-0.000000075497901,0.000000000000000,0.000000000000000,1.000000000000000,0.000000000000000,0.000000000000000,0.000000000000000,1.350000143051147,0.000000000000000,1.000000000000000
+		}
+		PoseNode:  {
+			Node: "Model::door-right"
+			Matrix: 0.000000075497901,0.000000000000000,-1.000000000000000,0.000000000000000,-1.000000000000000,0.000000000000000,-0.000000075497901,0.000000000000000,0.000000000000000,1.000000000000000,0.000000000000000,0.000000000000000,0.000000000000000,1.350000023841858,0.000000000000000,1.000000000000000
+		}
+	}
+	GlobalSettings:  {
+		Version: 1000
+		Properties60:  {
+			Property: "UpAxis", "int", "",1
+			Property: "UpAxisSign", "int", "",1
+			Property: "FrontAxis", "int", "",2
+			Property: "FrontAxisSign", "int", "",1
+			Property: "CoordAxis", "int", "",0
+			Property: "CoordAxisSign", "int", "",1
+			Property: "UnitScaleFactor", "double", "",1
+		}
+	}
+}
+
+; Object relations
+;------------------------------------------------------------------
+
+Relations:  {
+	Model: "Model::door-hinge-left", "Null" {
+	}
+	Model: "Model::door-hinge-right", "Null" {
+	}
+	Model: "Model::door-frame", "Mesh" {
+	}
+	Model: "Model::door-left", "Mesh" {
+	}
+	Model: "Model::door-right", "Mesh" {
+	}
+	Model: "Model::Producer Perspective", "Camera" {
+	}
+	Model: "Model::Producer Top", "Camera" {
+	}
+	Model: "Model::Producer Bottom", "Camera" {
+	}
+	Model: "Model::Producer Front", "Camera" {
+	}
+	Model: "Model::Producer Back", "Camera" {
+	}
+	Model: "Model::Producer Right", "Camera" {
+	}
+	Model: "Model::Producer Left", "Camera" {
+	}
+	Model: "Model::Camera Switcher", "CameraSwitcher" {
+	}
+	Material: "Material::dev_measuredoor01", "" {
+	}
+	GroupSelection: "GroupSelection::double-door", "Default" {
+	}
+}
+
+; Object connections
+;------------------------------------------------------------------
+
+Connections:  {
+	Connect: "OO", "Model::door-frame", "Model::Scene"
+	Connect: "OO", "Model::door-left", "Model::door-hinge-left"
+	Connect: "OO", "Model::door-right", "Model::door-hinge-right"
+	Connect: "OO", "Model::door-hinge-left", "Model::Scene"
+	Connect: "OO", "Model::door-hinge-right", "Model::Scene"
+	Connect: "OO", "Material::dev_measuredoor01", "Model::door-frame"
+	Connect: "OO", "Material::dev_measuredoor01", "Model::door-left"
+	Connect: "OO", "Material::dev_measuredoor01", "Model::door-right"
+	Connect: "OO", "Model::door-frame", "GroupSelection::double-door"
+	Connect: "OO", "Model::door-left", "GroupSelection::double-door"
+	Connect: "OO", "Model::door-right", "GroupSelection::double-door"
+	Connect: "OO", "Model::door-hinge-left", "GroupSelection::double-door"
+	Connect: "OO", "Model::door-hinge-right", "GroupSelection::double-door"
+}
+;Takes and animation section
+;----------------------------------------------------
+
+Takes:  {
+	Current: "Default Take"
+	Take: "Default Take" {
+		FileName: "Default_Take.tak"
+		LocalTime: -1539538599,138558474000
+		ReferenceTime: -1539538599,138558474000
+
+		;Models animation
+		;----------------------------------------------------
+		Model: "Model::door-frame" {
+			Version: 1.1
+			Channel: "Transform" {
+				Channel: "T" {
+					Channel: "X" {
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+						KeyVer: 4005
+						KeyCount: 1
+						Key: 
+							0,0.000000000000000,L
+						Color: 1,0,0
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+					Channel: "Y" {
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+						KeyVer: 4005
+						KeyCount: 1
+						Key: 
+							0,1.399999976158142,L
+						Color: 0,1,0
+					}
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+						KeyCount: 1
+						Key: 
+							0,0.000000000000000,L
+						Color: 0,0,1
+					}
+					LayerType: 1
+				}
+				Channel: "R" {
+					Channel: "X" {
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+						KeyCount: 1
+						Key: 
+							0,-90.000002504348856,L
+						Color: 1,0,0
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+							0,-0.000000000000000,L
+						Color: 0,1,0
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+						Color: 0,0,1
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+					LayerType: 2
+				}
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+					}
+					LayerType: 3
+				}
+			}
+		}
+		Model: "Model::door-left" {
+			Version: 1.1
+			Channel: "Transform" {
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+							0,1.350000143051147,L
+						Color: 0,0,1
+					}
+					LayerType: 1
+				}
+				Channel: "R" {
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+						Key: 
+							0,0.000000000000000,L
+						Color: 1,0,0
+					}
+					Channel: "Y" {
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+							0,-0.000000000000000,L
+						Color: 0,1,0
+					}
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+					}
+					LayerType: 2
+				}
+				Channel: "S" {
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+					LayerType: 3
+				}
+			}
+		}
+		Model: "Model::door-right" {
+			Version: 1.1
+			Channel: "Transform" {
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+					Channel: "X" {
+						Default: 0.000000000000000
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+						Color: 1,0,0
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+						Color: 0,1,0
+					}
+					Channel: "Z" {
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+							0,1.350000023841858,L
+						Color: 0,0,1
+					}
+					LayerType: 1
+				}
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+							0,0.000000000000000,L
+						Color: 1,0,0
+					}
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+							0,-0.000000000000000,L
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+					}
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+					LayerType: 2
+				}
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+							0,1.000000000000000,L
+						Color: 0,0,1
+					}
+					LayerType: 3
+				}
+			}
+		}
+		Model: "Model::door-hinge-left" {
+			Version: 1.1
+			Channel: "Transform" {
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