diff --git a/configure.py b/configure.py
index 7b69047a..0138c52b 100755
--- a/configure.py
+++ b/configure.py
@@ -28,6 +28,7 @@ COMPLETE_OBJECTS = [
     "MetroidPrime/HUD/CHUDMemoParms",
     "MetroidPrime/ScriptObjects/CScriptDebugCameraWaypoint",
     "Weapons/IWeaponRenderer",
+    "Collision/CMaterialList",
     "Collision/CMRay",
     "Kyoto/Basics/CStopwatch",
     "Kyoto/Basics/COsContextDolphin",
diff --git a/include/Collision/CMaterialFilter.hpp b/include/Collision/CMaterialFilter.hpp
index 59bf00e6..6880396d 100644
--- a/include/Collision/CMaterialFilter.hpp
+++ b/include/Collision/CMaterialFilter.hpp
@@ -6,6 +6,7 @@
 #include "Collision/CMaterialList.hpp"
 
 class CMaterialFilter {
+  static const CMaterialFilter skPassEverything;
 public:
   enum EFilterType {
     kFT_Always,
@@ -14,7 +15,7 @@ public:
     kFT_IncludeExclude,
   };
 
-  CMaterialFilter() : type(kFT_Always) {}
+  CMaterialFilter() : include(0x00000000FFFFFFFF), exclude(0), type(kFT_Always) {}
   CMaterialFilter(const CMaterialList& include, const CMaterialList& exclude, EFilterType type)
   : include(include), exclude(exclude), type(type) {}
 
@@ -29,6 +30,8 @@ public:
     return CMaterialFilter(include, exclude, kFT_IncludeExclude);
   }
 
+  bool Passes(const CMaterialList& other) const;
+
 private:
   CMaterialList include;
   CMaterialList exclude;
diff --git a/include/Collision/CMaterialList.hpp b/include/Collision/CMaterialList.hpp
index a1282f00..8c1fe409 100644
--- a/include/Collision/CMaterialList.hpp
+++ b/include/Collision/CMaterialList.hpp
@@ -116,9 +116,11 @@ public:
   // HasMaterials__13CMaterialListCFv weak
   // GetField__13CMaterialListCFUxUx weak
   // Intersection__13CMaterialListCFRC13CMaterialList weak
-  // BitPosition__13CMaterialListFUx global
+  static s32 BitPosition(u64 flags);
   // GetMaterialString__13CMaterialListCFv weak
-  // SharesMaterials__13CMaterialListCFRC13CMaterialList weak
+  u64 SharesMaterials(const CMaterialList& other) const {
+    return (other.value & value);
+  }
 
 private:
   u64 value;
diff --git a/src/Collision/CMaterialFilter.cpp b/src/Collision/CMaterialFilter.cpp
new file mode 100644
index 00000000..0a4668cf
--- /dev/null
+++ b/src/Collision/CMaterialFilter.cpp
@@ -0,0 +1,25 @@
+#include "Collision/CMaterialFilter.hpp"
+
+const CMaterialFilter CMaterialFilter::skPassEverything;
+
+bool CMaterialFilter::Passes(const CMaterialList& other) const {
+  switch (type) {
+  case kFT_Always:
+    return true;
+  case kFT_Include:
+    return other.SharesMaterials(include) != 0 ? true : false;
+  case kFT_Exclude:
+    return other.SharesMaterials(exclude) == 0;
+  case kFT_IncludeExclude: {
+    bool ret = false;
+    if (other.SharesMaterials(include) != 0) {
+      if (other.SharesMaterials(exclude) == 0) {
+        ret = true;
+      }
+    }
+    return ret;
+  }
+  default:
+    return true;
+  }
+}
diff --git a/src/Collision/CMaterialList.cpp b/src/Collision/CMaterialList.cpp
new file mode 100644
index 00000000..956927fa
--- /dev/null
+++ b/src/Collision/CMaterialList.cpp
@@ -0,0 +1,12 @@
+#include "Collision/CMaterialList.hpp"
+
+s32 CMaterialList::BitPosition(u64 flags) {
+  for (int ret = 0, i = 0; i < 32; ++i) {
+    if ((flags & 1) != 0) {
+      return ret;
+    }
+    flags >>= 1;
+    ++ret;
+  }
+  return -1;
+}