diff --git a/cmake/sourcelist.cmake b/cmake/sourcelist.cmake
index 77176eb8f..9b758a083 100644
--- a/cmake/sourcelist.cmake
+++ b/cmake/sourcelist.cmake
@@ -215,6 +215,7 @@ set(SOURCES
 	include/RE/B/BSBitField.h
 	include/RE/B/BSBloodSplatterShaderProperty.h
 	include/RE/B/BSBound.h
+	include/RE/B/BSCompoundFrustum.h
 	include/RE/B/BSComputeShader.h
 	include/RE/B/BSContainer.h
 	include/RE/B/BSCoreTypes.h
@@ -294,10 +295,14 @@ set(SOURCES
 	include/RE/B/BSNavmeshInfoMap.h
 	include/RE/B/BSNiAllocator.h
 	include/RE/B/BSNiNode.h
+	include/RE/B/BSOcclusionBox.h
+	include/RE/B/BSOcclusionPlane.h
+	include/RE/B/BSOcclusionShape.h
 	include/RE/B/BSOrderedNode.h
 	include/RE/B/BSPCGamepadDeviceDelegate.h
 	include/RE/B/BSPCGamepadDeviceHandler.h
 	include/RE/B/BSPCOrbisGamepadDevice.h
+	include/RE/B/BSParabolicCullingProcess.h
 	include/RE/B/BSParticleShaderCubeEmitter.h
 	include/RE/B/BSParticleShaderEmitter.h
 	include/RE/B/BSParticleShaderObjectEmitter.h
@@ -308,7 +313,10 @@ set(SOURCES
 	include/RE/B/BSPointerHandle.h
 	include/RE/B/BSPointerHandleManager.h
 	include/RE/B/BSPointerHandleSmartPointer.h
+	include/RE/B/BSPortal.h
 	include/RE/B/BSPortalGraph.h
+	include/RE/B/BSPortalGraphEntry.h
+	include/RE/B/BSPortalSharedNode.h
 	include/RE/B/BSPrecomputedNavmeshInfoPathMap.h
 	include/RE/B/BSReloadShaderI.h
 	include/RE/B/BSRenderPass.h
diff --git a/include/RE/B/BSCompoundFrustum.h b/include/RE/B/BSCompoundFrustum.h
new file mode 100644
index 000000000..04f6bda29
--- /dev/null
+++ b/include/RE/B/BSCompoundFrustum.h
@@ -0,0 +1,26 @@
+#pragma once
+
+#include "RE/B/BSTArray.h"
+#include "RE/N/NiFrustumPlanes.h"
+#include "RE/N/NiPoint3.h"
+
+namespace RE
+{
+	class NiCamera;
+
+	class BSCompoundFrustum
+	{
+	public:
+		// members
+		BSTArray<void*> unk00;          // 00
+		BSTArray<void*> unk18;          // 18
+		NiFrustumPlanes frustumPlanes;  // 30
+		NiPoint3        unkA0;          // A0
+		NiCamera*       camera;         // B0
+		uint32_t        unkB8;          // B8
+		uint32_t        unkBC;          // BC
+		uint32_t        unkC0;          // C0
+		uint16_t        unkC4;          // C4
+	};
+	static_assert(sizeof(BSCompoundFrustum) == 0xC8);
+}
diff --git a/include/RE/B/BSLight.h b/include/RE/B/BSLight.h
index 145a88ec0..9ecc2c01e 100644
--- a/include/RE/B/BSLight.h
+++ b/include/RE/B/BSLight.h
@@ -8,10 +8,13 @@
 namespace RE
 {
 	class BSCullingProcess;
+	class BSLensFlareRenderData;
+	class BSMultiBoundRoom;
+	class BSPortal;
 	class BSPortalGraph;
+	class BSPortalSharedNode;
 	class BSTriShape;
 	class NiAVObject;
-	class BSLensFlareRenderData;
 	class NiLight;
 
 	class BSLight : public NiRefObject
@@ -44,36 +47,36 @@ namespace RE
 		virtual bool IsShadowLight();             // 03
 
 		// members
-		float                  luminance;       // 010
-		float                  lodDimmer;       // 014
-		Data                   unk018;          // 018
-		std::uint64_t          unk038;          // 038
-		std::uint32_t          unk040;          // 040
-		bool                   pointLight;      // 044
-		bool                   ambientLight;    // 045
-		bool                   dynamic;         // 046
-		bool                   portalStrict;    // 047
-		NiPointer<NiLight>     light;           // 048
-		NiPoint3               worldTranslate;  // 050
-		std::uint32_t          frustrumCull;    // 05C
-		std::uint8_t           unk060;          // 060
-		bool                   affectLand;      // 061
-		bool                   affectWater;     // 062
-		bool                   neverFades;      // 063
-		std::uint32_t          unk064;          // 064
-		std::uint64_t          unk068;          // 068
-		std::uint8_t           unk070[96];      // 070
-		std::uint8_t           unk0D0;          // 0D0
-		std::uint8_t           pad0D1;          // 0D1
-		std::uint16_t          pad0D2;          // 0D2
-		std::uint32_t          pad0D4;          // 0D4
-		BSTArray<void*>        unk0D8;          // 0D8
-		BSTArray<void*>        unk0F0;          // 0F0
-		BSTArray<void*>        unk108;          // 108
-		BSPortalGraph*         portalGraph;     // 120
-		BSCullingProcess*      cullingProcess;  // 128
-		NiPointer<NiAVObject>  objectNode;      // 130
-		BSLensFlareRenderData* lensFlareData;   // 138
+		float                         luminance;          // 010
+		float                         lodDimmer;          // 014
+		Data                          unk018;             // 018
+		std::uint64_t                 unk038;             // 038
+		std::uint32_t                 unk040;             // 040
+		bool                          pointLight;         // 044
+		bool                          ambientLight;       // 045
+		bool                          dynamic;            // 046
+		bool                          portalStrict;       // 047
+		NiPointer<NiLight>            light;              // 048
+		NiPoint3                      worldTranslate;     // 050
+		std::uint32_t                 frustrumCull;       // 05C
+		std::uint8_t                  unk060;             // 060
+		bool                          affectLand;         // 061
+		bool                          affectWater;        // 062
+		bool                          neverFades;         // 063
+		std::uint32_t                 unk064;             // 064
+		std::uint64_t                 unk068;             // 068
+		std::uint8_t                  unk070[96];         // 070
+		std::uint8_t                  unk0D0;             // 0D0
+		std::uint8_t                  pad0D1;             // 0D1
+		std::uint16_t                 pad0D2;             // 0D2
+		std::uint32_t                 pad0D4;             // 0D4
+		BSTArray<BSMultiBoundRoom*>   rooms;              // 0D8
+		BSTArray<BSPortal*>           portals;            // 0F0
+		BSTArray<BSPortalSharedNode*> portalSharedNodes;  // 108
+		BSPortalGraph*                portalGraph;        // 120
+		BSCullingProcess*             cullingProcess;     // 128
+		NiPointer<NiAVObject>         objectNode;         // 130
+		BSLensFlareRenderData*        lensFlareData;      // 138
 	};
 	static_assert(sizeof(BSLight) == 0x140);
 }
diff --git a/include/RE/B/BSOcclusionBox.h b/include/RE/B/BSOcclusionBox.h
new file mode 100644
index 000000000..b38c75d72
--- /dev/null
+++ b/include/RE/B/BSOcclusionBox.h
@@ -0,0 +1,51 @@
+#pragma once
+
+#include "RE/B/BSCompoundFrustum.h"
+#include "RE/B/BSOcclusionShape.h"
+#include "RE/N/NiPoint2.h"
+
+namespace RE
+{
+	class BSOcclusionBox : public BSOcclusionShape
+	{
+	public:
+		inline static constexpr auto RTTI = RTTI_BSOcclusionBox;
+		inline static constexpr auto Ni_RTTI = NiRTTI_BSOcclusionBox;
+		inline static constexpr auto VTABLE = VTABLE_BSOcclusionBox;
+
+		~BSOcclusionBox() override;  // 00
+
+		// override (BSOcclusionShape)
+		const NiRTTI* GetRTTI() const override;                           // 02
+		NiObject*     CreateClone(NiCloningProcess& a_cloning) override;  // 17
+		bool          IsOcclusionPlane() const override;                  // 25
+		bool          IsOcclusionBox() const override;                    // 25
+
+		// members
+		NiPoint3        size;              // 048
+		NiFrustumPlanes frustumPlanes[2];  // 054
+		uint64_t        unk138;            // 138
+		uint64_t        unk140;            // 140
+		uint64_t        unk148;            // 148
+		uint64_t        unk150;            // 150
+		uint64_t        unk158;            // 158
+		uint64_t        unk160;            // 160
+		uint64_t        unk168;            // 168
+		uint64_t        unk170;            // 170
+		uint64_t        unk178;            // 178
+		uint64_t        unk180;            // 180
+		uint64_t        unk188;            // 188
+		uint64_t        unk190;            // 190
+		uint64_t        unk198;            // 198
+		uint64_t        unk1A0;            // 1A0
+		uint64_t        unk1A8;            // 1A8
+		uint64_t        unk1B0;            // 1B0
+		uint64_t        unk1B8;            // 1B8
+		uint64_t        unk1C0;            // 1C0
+		uint64_t        unk1C8;            // 1C8
+		uint64_t        unk1D0;            // 1D0
+		uint64_t        unk1D8;            // 1D8
+		uint64_t        unk1E0;            // 1E0
+	};
+	static_assert(sizeof(BSOcclusionBox) == 0x1E8);
+}
diff --git a/include/RE/B/BSOcclusionPlane.h b/include/RE/B/BSOcclusionPlane.h
new file mode 100644
index 000000000..7a50d4291
--- /dev/null
+++ b/include/RE/B/BSOcclusionPlane.h
@@ -0,0 +1,29 @@
+#pragma once
+
+#include "RE/B/BSCompoundFrustum.h"
+#include "RE/B/BSOcclusionShape.h"
+#include "RE/N/NiPoint2.h"
+
+namespace RE
+{
+	class BSOcclusionPlane : public BSOcclusionShape
+	{
+	public:
+		inline static constexpr auto RTTI = RTTI_BSOcclusionPlane;
+		inline static constexpr auto Ni_RTTI = NiRTTI_BSOcclusionPlane;
+		inline static constexpr auto VTABLE = VTABLE_BSOcclusionPlane;
+
+		~BSOcclusionPlane() override;  // 00
+
+		// override (BSOcclusionShape)
+		const NiRTTI* GetRTTI() const override;                           // 02
+		NiObject*     CreateClone(NiCloningProcess& a_cloning) override;  // 17
+		bool          IsOcclusionPlane() const override;                  // 25
+		bool          IsOcclusionBox() const override;                    // 25
+
+		// members
+		NiPoint2          size;     // 48
+		BSCompoundFrustum frustum;  // 50
+	};
+	static_assert(sizeof(BSOcclusionPlane) == 0x118);
+}
diff --git a/include/RE/B/BSOcclusionShape.h b/include/RE/B/BSOcclusionShape.h
new file mode 100644
index 000000000..e86625c51
--- /dev/null
+++ b/include/RE/B/BSOcclusionShape.h
@@ -0,0 +1,33 @@
+#pragma once
+
+#include "RE/N/NiMatrix3.h"
+#include "RE/N/NiObject.h"
+#include "RE/N/NiPoint3.h"
+
+namespace RE
+{
+	class BSOcclusionShape : public NiObject
+	{
+	public:
+		inline static constexpr auto RTTI = RTTI_BSOcclusionShape;
+		inline static constexpr auto Ni_RTTI = NiRTTI_BSOcclusionShape;
+		inline static constexpr auto VTABLE = VTABLE_BSOcclusionShape;
+
+		~BSOcclusionShape() override;  // 00
+
+		// override (NiObject)
+		const NiRTTI* GetRTTI() const override;                           // 02
+		NiObject*     CreateClone(NiCloningProcess& a_cloning) override;  // 17
+
+		// add
+		virtual bool IsOcclusionPlane() const = 0;  // 25
+		virtual bool IsOcclusionBox() const = 0;    // 25
+
+		// members
+		NiPoint3  translation;  // 10
+		NiMatrix3 rotation;     // 1C
+		float     unk40;        // 40
+		bool      unk44;        // 44
+	};
+	static_assert(sizeof(BSOcclusionShape) == 0x48);
+}
diff --git a/include/RE/B/BSParabolicCullingProcess.h b/include/RE/B/BSParabolicCullingProcess.h
new file mode 100644
index 000000000..e01d73838
--- /dev/null
+++ b/include/RE/B/BSParabolicCullingProcess.h
@@ -0,0 +1,35 @@
+#pragma once
+
+#include "RE/B/BSCullingProcess.h"
+
+namespace RE
+{
+	class BSShaderAccumulator;
+
+	class BSParabolicCullingProcess : public BSCullingProcess
+	{
+	public:
+		inline static constexpr auto RTTI = RTTI_BSParabolicCullingProcess;
+		inline static constexpr auto VTABLE = VTABLE_BSParabolicCullingProcess;
+
+		// override (BSCullingProcess)
+		const NiRTTI* GetRTTI() const override;  // 00
+
+		~BSParabolicCullingProcess() override;  // 15
+
+		virtual void               Process1(NiAVObject* a_object, std::uint32_t a_arg2) override;                                   // 16
+		virtual void               Process2(const NiCamera* a_camera, NiAVObject* a_scene, NiVisibleArray* a_visibleSet) override;  // 17
+		virtual void               AppendNonAccum(NiAVObject& a_object) override;                                                   // 19
+		virtual bool               TestBaseVisibility1(BSMultiBound& a_bound) override;                                             // 1A
+		virtual bool               TestBaseVisibility2(BSOcclusionPlane& a_bound) override;                                         // 1B
+		[[nodiscard]] virtual bool TestBaseVisibility3(const NiBound& a_bound) const override;                                      // 1C
+
+		float                          unk301F8;                   // 301F8
+		NiPointer<BSShaderAccumulator> backHemisphereAccumulator;  // 30200
+		NiPlane                        equatorialPlane;            // 30208
+		NiPoint3                       lightPosition;              // 30218
+		float                          lightRadius;                // 30224
+		NiPointer<NiCamera>            lightCamera;                // 30228
+	};
+	static_assert(sizeof(BSParabolicCullingProcess) == 0x30230);
+}
diff --git a/include/RE/B/BSPortal.h b/include/RE/B/BSPortal.h
new file mode 100644
index 000000000..8d6e3117e
--- /dev/null
+++ b/include/RE/B/BSPortal.h
@@ -0,0 +1,29 @@
+#pragma once
+
+#include "RE/B/BSOcclusionPlane.h"
+
+namespace RE
+{
+	class BSMultiBoundRoom;
+	class BSPortalSharedNode;
+
+	class BSPortal : public BSOcclusionPlane
+	{
+	public:
+		inline static constexpr auto RTTI = RTTI_BSPortal;
+		inline static constexpr auto Ni_RTTI = NiRTTI_BSPortal;
+		inline static constexpr auto VTABLE = VTABLE_BSPortal;
+
+		~BSPortal() override;  // 00
+
+		// override (BSOcclusionPlane)
+		const NiRTTI* GetRTTI() const override;                           // 02
+		NiObject*     CreateClone(NiCloningProcess& a_cloning) override;  // 17
+
+		// members
+		BSMultiBoundRoom*             entranceRoom;      // 118
+		BSMultiBoundRoom*             exitRoom;          // 120
+		NiPointer<BSPortalSharedNode> portalSharedNode;  // 128
+	};
+	static_assert(sizeof(BSPortal) == 0x130);
+}
diff --git a/include/RE/B/BSPortalGraph.h b/include/RE/B/BSPortalGraph.h
index 6425aa81e..d3a25c6d5 100644
--- a/include/RE/B/BSPortalGraph.h
+++ b/include/RE/B/BSPortalGraph.h
@@ -6,6 +6,10 @@
 
 namespace RE
 {
+	class BSMultiBoundRoom;
+	class BSOcclusionShape;
+	class BSPortal;
+	class BSPortalSharedNode;
 	class NiAVObject;
 	class NiNode;
 
@@ -15,25 +19,37 @@ namespace RE
 		inline static constexpr auto RTTI = RTTI_BSPortalGraph;
 		inline static constexpr auto VTABLE = VTABLE_BSPortalGraph;
 
+		template <typename T>
+		struct ListEntry
+		{
+			ListEntry<T>* next;   // 00
+			ListEntry<T>* prev;   // 08
+			T*            value;  // 10
+		};
+		static_assert(sizeof(ListEntry<BSPortal>) == 0x18);
+
+		template <typename T>
+		struct List
+		{
+			ListEntry<T>* first;  // 00
+			ListEntry<T>* last;   // 08
+			uint32_t      count;  // 10
+		};
+		static_assert(sizeof(List<BSPortal>) == 0x18);
+
 		~BSPortalGraph() override;  // 00
 
 		// members
-		std::uint64_t                   unk10;             // 10
-		std::uint64_t                   unk18;             // 18
-		std::uint32_t                   unk20;             // 20
-		std::uint32_t                   unk24;             // 24
-		std::uint64_t                   unk28;             // 28
-		std::uint64_t                   unk30;             // 30
-		std::uint32_t                   unk38;             // 38
-		std::uint32_t                   unk3C;             // 3C
-		BSTArray<void*>                 unk40;             // 40
-		BSTArray<void*>                 unk58;             // 58
-		NiPointer<NiNode>               portalSharedNode;  // 70
-		BSTArray<NiPointer<NiAVObject>> unk78;             // 78
-		BSTArray<NiPointer<NiAVObject>> unk90;             // 90
-		BSTArray<void*>                 unkA8;             // A8
-		FormID                          cellID;            // C0
-		std::uint32_t                   padC4;             // C4
+		List<BSOcclusionShape>                occlusionShapes;   // 10
+		List<BSPortal>                        portals;           // 28
+		BSTArray<NiPointer<BSMultiBoundRoom>> rooms;             // 40
+		BSTArray<NiPointer<NiAVObject>>       unk58;             // 58
+		NiPointer<BSPortalSharedNode>         portalSharedNode;  // 70
+		BSTArray<NiPointer<NiAVObject>>       unk78;             // 78
+		BSTArray<NiPointer<NiAVObject>>       unk90;             // 90
+		BSTArray<void*>                       unkA8;             // A8
+		FormID                                cellID;            // C0
+		std::uint32_t                         padC4;             // C4
 	};
 	static_assert(sizeof(BSPortalGraph) == 0xC8);
 }
diff --git a/include/RE/B/BSPortalGraphEntry.h b/include/RE/B/BSPortalGraphEntry.h
new file mode 100644
index 000000000..aa0d5a8e1
--- /dev/null
+++ b/include/RE/B/BSPortalGraphEntry.h
@@ -0,0 +1,32 @@
+#pragma once
+
+#include "RE/B/BSCompoundFrustum.h"
+#include "RE/B/BSTHashMap.h"
+#include "RE/N/NiRefObject.h"
+#include "RE/N/NiSmartPointer.h"
+
+namespace RE
+{
+	class BSMultiBoundRoom;
+	class BSPortalGraph;
+	class NiNode;
+
+	class BSPortalGraphEntry : public NiRefObject
+	{
+	public:
+		inline static constexpr auto RTTI = RTTI_BSPortalGraphEntry;
+		inline static constexpr auto VTABLE = VTABLE_BSPortalGraphEntry;
+
+		~BSPortalGraphEntry() override;  // 00
+
+		// members
+		BSPortalGraph*                          portalGraph;      // 10
+		BSTArray<NiPointer<BSMultiBoundRoom>>   rooms;            // 18
+		NiPointer<BSMultiBoundRoom>             room;             // 30
+		BSTHashMap<NiNode*, BSCompoundFrustum*> nodes;            // 38
+		BSCompoundFrustum                       compoundFrustum;  // 68
+		uint64_t                                unk130;           // 130
+		uint32_t                                cellId;           // 138
+	};
+	static_assert(sizeof(BSPortalGraphEntry) == 0x140);
+}
diff --git a/include/RE/B/BSPortalSharedNode.h b/include/RE/B/BSPortalSharedNode.h
new file mode 100644
index 000000000..ba6582f3b
--- /dev/null
+++ b/include/RE/B/BSPortalSharedNode.h
@@ -0,0 +1,30 @@
+#pragma once
+
+#include "RE/B/BSTArray.h"
+#include "RE/N/NiNode.h"
+
+namespace RE
+{
+	class BSLight;
+	class BSPortal;
+
+	class BSPortalSharedNode : public NiNode
+	{
+	public:
+		inline static constexpr auto RTTI = RTTI_BSPortalSharedNode;
+		inline static constexpr auto Ni_RTTI = NiRTTI_BSPortalSharedNode;
+		inline static constexpr auto VTABLE = VTABLE_BSPortalSharedNode;
+
+		~BSPortalSharedNode() override;  // 00
+
+		// override (NiNode)
+		const NiRTTI* GetRTTI() const override;                           // 02
+		NiObject*     CreateClone(NiCloningProcess& a_cloning) override;  // 17
+		void          OnVisible(NiCullingProcess& a_process) override;    // 34
+
+		// members
+		BSTArray<BSLight*> lights;  // 128
+		BSPortal*          portal;  // 140
+	};
+	static_assert(sizeof(BSPortalSharedNode) == 0x148);
+}
diff --git a/include/RE/Skyrim.h b/include/RE/Skyrim.h
index 8c806340c..38197b515 100644
--- a/include/RE/Skyrim.h
+++ b/include/RE/Skyrim.h
@@ -218,6 +218,7 @@
 #include "RE/B/BSBitField.h"
 #include "RE/B/BSBloodSplatterShaderProperty.h"
 #include "RE/B/BSBound.h"
+#include "RE/B/BSCompoundFrustum.h"
 #include "RE/B/BSComputeShader.h"
 #include "RE/B/BSContainer.h"
 #include "RE/B/BSCullingProcess.h"
@@ -296,10 +297,14 @@
 #include "RE/B/BSNavmeshInfoMap.h"
 #include "RE/B/BSNiAllocator.h"
 #include "RE/B/BSNiNode.h"
+#include "RE/B/BSOcclusionBox.h"
+#include "RE/B/BSOcclusionPlane.h"
+#include "RE/B/BSOcclusionShape.h"
 #include "RE/B/BSOrderedNode.h"
 #include "RE/B/BSPCGamepadDeviceDelegate.h"
 #include "RE/B/BSPCGamepadDeviceHandler.h"
 #include "RE/B/BSPCOrbisGamepadDevice.h"
+#include "RE/B/BSParabolicCullingProcess.h"
 #include "RE/B/BSParticleShaderCubeEmitter.h"
 #include "RE/B/BSParticleShaderEmitter.h"
 #include "RE/B/BSParticleShaderObjectEmitter.h"
@@ -310,7 +315,10 @@
 #include "RE/B/BSPointerHandle.h"
 #include "RE/B/BSPointerHandleManager.h"
 #include "RE/B/BSPointerHandleSmartPointer.h"
+#include "RE/B/BSPortal.h"
 #include "RE/B/BSPortalGraph.h"
+#include "RE/B/BSPortalGraphEntry.h"
+#include "RE/B/BSPortalSharedNode.h"
 #include "RE/B/BSPrecomputedNavmeshInfoPathMap.h"
 #include "RE/B/BSReloadShaderI.h"
 #include "RE/B/BSRenderPass.h"