diff --git a/data/uking_functions.csv b/data/uking_functions.csv
index 919d50e1..c3f4c05b 100644
--- a/data/uking_functions.csv
+++ b/data/uking_functions.csv
@@ -93355,25 +93355,25 @@ Address,Quality,Size,Name
 0x00000071012135e8,U,000056,
 0x0000007101213620,U,000092,
 0x000000710121367c,U,000144,Hio::createInstance
-0x000000710121370c,U,000168,
-0x00000071012137b4,U,000080,
-0x0000007101213804,U,000080,
-0x0000007101213854,U,000080,
-0x00000071012138a4,U,000076,
-0x00000071012138f0,U,000080,
-0x0000007101213940,U,000140,
-0x00000071012139cc,U,000144,
-0x0000007101213a5c,U,000144,
-0x0000007101213aec,U,000144,
-0x0000007101213b7c,U,000144,
+0x000000710121370c,O,000168,_ZN4ksys4phys11GroupFilterC2ENS0_16ContactLayerTypeENS0_12ContactLayer9ValueTypeES4_
+0x00000071012137b4,O,000080,_ZN4ksys4phys11GroupFilterD1Ev
+0x0000007101213804,O,000080,_ZThn16_N4ksys4phys11GroupFilterD1Ev
+0x0000007101213854,O,000080,_ZThn24_N4ksys4phys11GroupFilterD1Ev
+0x00000071012138a4,O,000076,_ZThn32_N4ksys4phys11GroupFilterD1Ev
+0x00000071012138f0,O,000080,_ZThn40_N4ksys4phys11GroupFilterD1Ev
+0x0000007101213940,O,000140,_ZN4ksys4phys11GroupFilterD0Ev
+0x00000071012139cc,O,000144,_ZThn16_N4ksys4phys11GroupFilterD0Ev
+0x0000007101213a5c,O,000144,_ZThn24_N4ksys4phys11GroupFilterD0Ev
+0x0000007101213aec,O,000144,_ZThn32_N4ksys4phys11GroupFilterD0Ev
+0x0000007101213b7c,O,000144,_ZThn40_N4ksys4phys11GroupFilterD0Ev
 0x0000007101213c0c,U,000092,
 0x0000007101213c68,U,000148,
 0x0000007101213cfc,U,000160,
 0x0000007101213d9c,U,000148,
 0x0000007101213e30,U,000008,
 0x0000007101213e38,U,000024,
-0x0000007101213e50,U,000112,
-0x0000007101213ec0,U,000092,
+0x0000007101213e50,O,000112,_ZNK4ksys4phys11GroupFilter27checkDerivedRuntimeTypeInfoEPKN4sead15RuntimeTypeInfo9InterfaceE
+0x0000007101213ec0,O,000092,_ZNK4ksys4phys11GroupFilter18getRuntimeTypeInfoEv
 0x0000007101213f1c,U,000004,nullsub_4710
 0x0000007101213f20,U,000100,
 0x0000007101213f84,U,000108,
diff --git a/src/KingSystem/Physics/CMakeLists.txt b/src/KingSystem/Physics/CMakeLists.txt
index 1d755e79..72dbd059 100644
--- a/src/KingSystem/Physics/CMakeLists.txt
+++ b/src/KingSystem/Physics/CMakeLists.txt
@@ -44,6 +44,8 @@ target_sources(uking PRIVATE
   System/physContactInfoTable.h
   System/physDefines.cpp
   System/physDefines.h
+  System/physGroupFilter.cpp
+  System/physGroupFilter.h
   System/physMaterialTable.cpp
   System/physMaterialTable.h
   System/physMemSystem.cpp
diff --git a/src/KingSystem/Physics/System/physGroupFilter.cpp b/src/KingSystem/Physics/System/physGroupFilter.cpp
new file mode 100644
index 00000000..ee698581
--- /dev/null
+++ b/src/KingSystem/Physics/System/physGroupFilter.cpp
@@ -0,0 +1,13 @@
+#include "KingSystem/Physics/System/physGroupFilter.h"
+
+namespace ksys::phys {
+
+GroupFilter::GroupFilter(ContactLayerType type, ContactLayer::ValueType layer_first,
+                         ContactLayer::ValueType layer_last)
+    : mIdxLayerFirst(layer_first), mIdxLayerLast(layer_last), mLayerType(type) {}
+
+GroupFilter::~GroupFilter() = default;
+
+void GroupFilter::m13() {}
+
+}  // namespace ksys::phys
diff --git a/src/KingSystem/Physics/System/physGroupFilter.h b/src/KingSystem/Physics/System/physGroupFilter.h
new file mode 100644
index 00000000..08a17ae2
--- /dev/null
+++ b/src/KingSystem/Physics/System/physGroupFilter.h
@@ -0,0 +1,44 @@
+#pragma once
+
+#include <Havok/Physics2012/Collide/Filter/Group/hkpGroupFilter.h>
+#include <basis/seadTypes.h>
+#include <container/seadOffsetList.h>
+#include <prim/seadRuntimeTypeInfo.h>
+#include <thread/seadCriticalSection.h>
+#include "KingSystem/Physics/System/physDefines.h"
+
+namespace ksys::phys {
+
+class GroupFilter : public hkpGroupFilter {
+    SEAD_RTTI_BASE(GroupFilter)
+public:
+    GroupFilter(ContactLayerType type, ContactLayer::ValueType layer_first,
+                ContactLayer::ValueType layer_last);
+    ~GroupFilter() override;
+
+protected:
+    virtual bool m2() { return true; }
+    virtual void m3() = 0;
+    virtual void m4() = 0;
+    virtual void m5() = 0;
+    virtual void m6() = 0;
+    virtual void m7() = 0;
+    virtual void m8() = 0;
+    virtual void m9() {}
+    virtual void m10() = 0;
+    virtual void m11() = 0;
+    virtual void m12() = 0;
+    virtual void m13();
+
+    u32 mIdxLayerFirst{};
+    u32 mIdxLayerLast{};
+    ContactLayerType mLayerType{};
+    u8 _11c{};
+    // FIXME: types
+    sead::OffsetList<void*> _120;
+    sead::OffsetList<void*> _138;
+    sead::CriticalSection mCS;
+    sead::OffsetList<void*> _190;
+};
+
+}  // namespace ksys::phys
diff --git a/src/KingSystem/Physics/System/physSystemData.h b/src/KingSystem/Physics/System/physSystemData.h
index 4392727b..38d7b7ff 100644
--- a/src/KingSystem/Physics/System/physSystemData.h
+++ b/src/KingSystem/Physics/System/physSystemData.h
@@ -25,8 +25,8 @@ constexpr int NumLayers = 32;
 
 struct LayerTableInfo : agl::utl::IParameterObj {
     sead::SafeArray<agl::utl::Parameter<int>, NumLayers> params;
-    void* table;
-    int idx = 0;
+    void* table;  // FIXME: type GroupFilter
+    int idx = 0;  // FIXME: ContactLayer
     int count;
 
 protected: