diff --git a/src/ZoneCommon/Game/IW3/ZoneConstantsIW3.h b/src/ZoneCommon/Game/IW3/ZoneConstantsIW3.h
index c8749356..db0e8333 100644
--- a/src/ZoneCommon/Game/IW3/ZoneConstantsIW3.h
+++ b/src/ZoneCommon/Game/IW3/ZoneConstantsIW3.h
@@ -38,7 +38,8 @@ namespace IW3
         static constexpr size_t AUTHED_CHUNK_SIZE = 0x2000;
         static constexpr unsigned AUTHED_CHUNK_COUNT_PER_GROUP = 256;
 
-        static constexpr unsigned OFFSET_BLOCK_BIT_COUNT = 4u;
+        static constexpr unsigned ZONE_POINTER_OFFSET_BIT_COUNT = 28u;
+        static constexpr unsigned ZONE_POINTER_BLOCK_BIT_COUNT = 4u;
         static constexpr block_t INSERT_BLOCK = XFILE_BLOCK_VIRTUAL;
     };
 } // namespace IW3
diff --git a/src/ZoneCommon/Game/IW4/ZoneConstantsIW4.h b/src/ZoneCommon/Game/IW4/ZoneConstantsIW4.h
index 598230cd..2153fb42 100644
--- a/src/ZoneCommon/Game/IW4/ZoneConstantsIW4.h
+++ b/src/ZoneCommon/Game/IW4/ZoneConstantsIW4.h
@@ -60,7 +60,8 @@ namespace IW4
         static constexpr size_t AUTHED_CHUNK_SIZE = 0x2000;
         static constexpr unsigned AUTHED_CHUNK_COUNT_PER_GROUP = 256;
 
-        static constexpr unsigned OFFSET_BLOCK_BIT_COUNT = 4u;
+        static constexpr unsigned ZONE_POINTER_OFFSET_BIT_COUNT = 28u;
+        static constexpr unsigned ZONE_POINTER_BLOCK_BIT_COUNT = 4u;
         static constexpr block_t INSERT_BLOCK = XFILE_BLOCK_VIRTUAL;
     };
 } // namespace IW4
diff --git a/src/ZoneCommon/Game/IW5/ZoneConstantsIW5.h b/src/ZoneCommon/Game/IW5/ZoneConstantsIW5.h
index 0e56f83d..c3f70d91 100644
--- a/src/ZoneCommon/Game/IW5/ZoneConstantsIW5.h
+++ b/src/ZoneCommon/Game/IW5/ZoneConstantsIW5.h
@@ -40,7 +40,8 @@ namespace IW5
         static constexpr size_t AUTHED_CHUNK_SIZE = 0x2000;
         static constexpr unsigned AUTHED_CHUNK_COUNT_PER_GROUP = 256;
 
-        static constexpr unsigned OFFSET_BLOCK_BIT_COUNT = 4u;
+        static constexpr unsigned ZONE_POINTER_OFFSET_BIT_COUNT = 28u;
+        static constexpr unsigned ZONE_POINTER_BLOCK_BIT_COUNT = 4u;
         static constexpr block_t INSERT_BLOCK = XFILE_BLOCK_VIRTUAL;
     };
 } // namespace IW5
diff --git a/src/ZoneCommon/Game/QOS/ZoneConstantsQOS.h b/src/ZoneCommon/Game/QOS/ZoneConstantsQOS.h
index 59d6dd34..37c6adc5 100644
--- a/src/ZoneCommon/Game/QOS/ZoneConstantsQOS.h
+++ b/src/ZoneCommon/Game/QOS/ZoneConstantsQOS.h
@@ -16,7 +16,8 @@ namespace QOS
         static constexpr size_t FILE_HEADER_SIZE = 28;
         static constexpr size_t AUTHED_CHUNK_SIZE = 0x20000;
 
-        static constexpr unsigned OFFSET_BLOCK_BIT_COUNT = 3u;
+        static constexpr unsigned ZONE_POINTER_OFFSET_BIT_COUNT = 29u;
+        static constexpr unsigned ZONE_POINTER_BLOCK_BIT_COUNT = 3u;
         static constexpr block_t INSERT_BLOCK = XFILE_BLOCK_VIRTUAL;
     };
 } // namespace QOS
diff --git a/src/ZoneCommon/Game/T4/ZoneConstantsT4.h b/src/ZoneCommon/Game/T4/ZoneConstantsT4.h
index 4b3ff034..7401473a 100644
--- a/src/ZoneCommon/Game/T4/ZoneConstantsT4.h
+++ b/src/ZoneCommon/Game/T4/ZoneConstantsT4.h
@@ -18,7 +18,8 @@ namespace T4
         static_assert(std::char_traits<char>::length(MAGIC_UNSIGNED) == sizeof(ZoneHeader::m_magic));
 
         static constexpr size_t AUTHED_CHUNK_SIZE = 0x2000;
-        static constexpr unsigned OFFSET_BLOCK_BIT_COUNT = 3u;
+        static constexpr unsigned ZONE_POINTER_OFFSET_BIT_COUNT = 29u;
+        static constexpr unsigned ZONE_POINTER_BLOCK_BIT_COUNT = 3u;
         static constexpr block_t INSERT_BLOCK = XFILE_BLOCK_VIRTUAL;
     };
 } // namespace T4
diff --git a/src/ZoneCommon/Game/T5/ZoneConstantsT5.h b/src/ZoneCommon/Game/T5/ZoneConstantsT5.h
index b36559ea..cc0b2d0f 100644
--- a/src/ZoneCommon/Game/T5/ZoneConstantsT5.h
+++ b/src/ZoneCommon/Game/T5/ZoneConstantsT5.h
@@ -20,7 +20,8 @@ namespace T5
         static constexpr size_t AUTHED_CHUNK_SIZE = 0x2000;
         static constexpr unsigned AUTHED_CHUNK_COUNT_PER_GROUP = 256;
 
-        static constexpr unsigned OFFSET_BLOCK_BIT_COUNT = 3u;
+        static constexpr unsigned ZONE_POINTER_OFFSET_BIT_COUNT = 29u;
+        static constexpr unsigned ZONE_POINTER_BLOCK_BIT_COUNT = 3u;
         static constexpr block_t INSERT_BLOCK = XFILE_BLOCK_VIRTUAL;
     };
 } // namespace T5
diff --git a/src/ZoneCommon/Game/T6/ZoneConstantsT6.h b/src/ZoneCommon/Game/T6/ZoneConstantsT6.h
index 8eae1291..ada75eac 100644
--- a/src/ZoneCommon/Game/T6/ZoneConstantsT6.h
+++ b/src/ZoneCommon/Game/T6/ZoneConstantsT6.h
@@ -33,7 +33,8 @@ namespace T6
         static constexpr unsigned XCHUNK_SIZE = 0x8000;
         static constexpr unsigned XCHUNK_MAX_WRITE_SIZE = XCHUNK_SIZE - 0x40;
         static constexpr unsigned VANILLA_BUFFER_SIZE = 0x80000;
-        static constexpr unsigned OFFSET_BLOCK_BIT_COUNT = 3u;
+        static constexpr unsigned ZONE_POINTER_OFFSET_BIT_COUNT = 29u;
+        static constexpr unsigned ZONE_POINTER_BLOCK_BIT_COUNT = 3u;
         static constexpr block_t INSERT_BLOCK = XFILE_BLOCK_VIRTUAL;
 
         static constexpr size_t FILE_SUFFIX_ZERO_MIN_SIZE = 0x40;
diff --git a/src/ZoneLoading/Game/IW3/ZoneLoaderFactoryIW3.cpp b/src/ZoneLoading/Game/IW3/ZoneLoaderFactoryIW3.cpp
index dd68de71..97d02ecd 100644
--- a/src/ZoneLoading/Game/IW3/ZoneLoaderFactoryIW3.cpp
+++ b/src/ZoneLoading/Game/IW3/ZoneLoaderFactoryIW3.cpp
@@ -208,7 +208,8 @@ std::unique_ptr<ZoneLoader> ZoneLoaderFactory::CreateLoaderForHeader(ZoneDataPee
                 return std::make_unique<ContentLoader>(*zonePtr, stream);
             },
             32u,
-            ZoneConstants::OFFSET_BLOCK_BIT_COUNT,
+            ZoneConstants::ZONE_POINTER_OFFSET_BIT_COUNT,
+            ZoneConstants::ZONE_POINTER_BLOCK_BIT_COUNT,
             ZoneConstants::INSERT_BLOCK,
             zonePtr,
             std::move(progressCallback)));
diff --git a/src/ZoneLoading/Game/IW4/ZoneLoaderFactoryIW4.cpp b/src/ZoneLoading/Game/IW4/ZoneLoaderFactoryIW4.cpp
index 4033eb5e..c5731ed1 100644
--- a/src/ZoneLoading/Game/IW4/ZoneLoaderFactoryIW4.cpp
+++ b/src/ZoneLoading/Game/IW4/ZoneLoaderFactoryIW4.cpp
@@ -376,7 +376,8 @@ std::unique_ptr<ZoneLoader> ZoneLoaderFactory::CreateLoaderForHeader(ZoneDataPee
                 return std::make_unique<ContentLoader>(*zonePtr, stream);
             },
             variant->GetWordSize() == GameWordSize::ARCH_64 ? 64u : 32u,
-            ZoneConstants::OFFSET_BLOCK_BIT_COUNT,
+            ZoneConstants::ZONE_POINTER_OFFSET_BIT_COUNT,
+            ZoneConstants::ZONE_POINTER_BLOCK_BIT_COUNT,
             ZoneConstants::INSERT_BLOCK,
             zonePtr,
             std::move(progressCallback)));
diff --git a/src/ZoneLoading/Game/IW5/ZoneLoaderFactoryIW5.cpp b/src/ZoneLoading/Game/IW5/ZoneLoaderFactoryIW5.cpp
index cb090a49..d265b45a 100644
--- a/src/ZoneLoading/Game/IW5/ZoneLoaderFactoryIW5.cpp
+++ b/src/ZoneLoading/Game/IW5/ZoneLoaderFactoryIW5.cpp
@@ -277,7 +277,8 @@ std::unique_ptr<ZoneLoader> ZoneLoaderFactory::CreateLoaderForHeader(ZoneDataPee
             return std::make_unique<ContentLoader>(*zonePtr, stream);
         },
         variant->GetWordSize() == GameWordSize::ARCH_64 ? 64u : 32u,
-        ZoneConstants::OFFSET_BLOCK_BIT_COUNT,
+        ZoneConstants::ZONE_POINTER_OFFSET_BIT_COUNT,
+        ZoneConstants::ZONE_POINTER_BLOCK_BIT_COUNT,
         ZoneConstants::INSERT_BLOCK,
         zonePtr,
         std::move(progressCallback)));
diff --git a/src/ZoneLoading/Game/QOS/ZoneLoaderFactoryQOS.cpp b/src/ZoneLoading/Game/QOS/ZoneLoaderFactoryQOS.cpp
index f376fefb..1acfe7d3 100644
--- a/src/ZoneLoading/Game/QOS/ZoneLoaderFactoryQOS.cpp
+++ b/src/ZoneLoading/Game/QOS/ZoneLoaderFactoryQOS.cpp
@@ -82,7 +82,8 @@ std::unique_ptr<ZoneLoader> ZoneLoaderFactory::CreateLoaderForHeader(ZoneDataPee
             return std::make_unique<ContentLoader>(*zonePtr, stream);
         },
         32u,
-        ZoneConstants::OFFSET_BLOCK_BIT_COUNT,
+        ZoneConstants::ZONE_POINTER_OFFSET_BIT_COUNT,
+        ZoneConstants::ZONE_POINTER_BLOCK_BIT_COUNT,
         ZoneConstants::INSERT_BLOCK,
         zonePtr,
         std::move(progressCallback)));
diff --git a/src/ZoneLoading/Game/T4/ZoneLoaderFactoryT4.cpp b/src/ZoneLoading/Game/T4/ZoneLoaderFactoryT4.cpp
index 877209c4..4666639d 100644
--- a/src/ZoneLoading/Game/T4/ZoneLoaderFactoryT4.cpp
+++ b/src/ZoneLoading/Game/T4/ZoneLoaderFactoryT4.cpp
@@ -85,7 +85,8 @@ std::unique_ptr<ZoneLoader> ZoneLoaderFactory::CreateLoaderForHeader(ZoneDataPee
             return std::make_unique<ContentLoader>(*zonePtr, stream);
         },
         32u,
-        ZoneConstants::OFFSET_BLOCK_BIT_COUNT,
+        ZoneConstants::ZONE_POINTER_OFFSET_BIT_COUNT,
+        ZoneConstants::ZONE_POINTER_BLOCK_BIT_COUNT,
         ZoneConstants::INSERT_BLOCK,
         zonePtr,
         std::move(progressCallback)));
diff --git a/src/ZoneLoading/Game/T5/ZoneLoaderFactoryT5.cpp b/src/ZoneLoading/Game/T5/ZoneLoaderFactoryT5.cpp
index 40456815..53a560e2 100644
--- a/src/ZoneLoading/Game/T5/ZoneLoaderFactoryT5.cpp
+++ b/src/ZoneLoading/Game/T5/ZoneLoaderFactoryT5.cpp
@@ -91,7 +91,8 @@ std::unique_ptr<ZoneLoader> ZoneLoaderFactory::CreateLoaderForHeader(ZoneDataPee
             return std::make_unique<ContentLoader>(*zonePtr, stream);
         },
         32u,
-        ZoneConstants::OFFSET_BLOCK_BIT_COUNT,
+        ZoneConstants::ZONE_POINTER_OFFSET_BIT_COUNT,
+        ZoneConstants::ZONE_POINTER_BLOCK_BIT_COUNT,
         ZoneConstants::INSERT_BLOCK,
         zonePtr,
         std::move(progressCallback)));
diff --git a/src/ZoneLoading/Game/T6/ZoneLoaderFactoryT6.cpp b/src/ZoneLoading/Game/T6/ZoneLoaderFactoryT6.cpp
index fb5933c6..480be412 100644
--- a/src/ZoneLoading/Game/T6/ZoneLoaderFactoryT6.cpp
+++ b/src/ZoneLoading/Game/T6/ZoneLoaderFactoryT6.cpp
@@ -348,7 +348,8 @@ std::unique_ptr<ZoneLoader> ZoneLoaderFactory::CreateLoaderForHeader(ZoneDataPee
                 return std::make_unique<ContentLoader>(*zonePtr, stream);
             },
             32u,
-            ZoneConstants::OFFSET_BLOCK_BIT_COUNT,
+            ZoneConstants::ZONE_POINTER_OFFSET_BIT_COUNT,
+            ZoneConstants::ZONE_POINTER_BLOCK_BIT_COUNT,
             ZoneConstants::INSERT_BLOCK,
             zonePtr,
             std::move(progressCallback)));
diff --git a/src/ZoneLoading/Loading/Steps/StepLoadZoneContent.cpp b/src/ZoneLoading/Loading/Steps/StepLoadZoneContent.cpp
index c82a35af..8ec3fcd7 100644
--- a/src/ZoneLoading/Loading/Steps/StepLoadZoneContent.cpp
+++ b/src/ZoneLoading/Loading/Steps/StepLoadZoneContent.cpp
@@ -9,13 +9,15 @@ namespace
     public:
         StepLoadZoneContent(std::function<std::unique_ptr<IContentLoadingEntryPoint>(ZoneInputStream&)> entryPointFactory,
                             const unsigned pointerBitCount,
-                            const unsigned offsetBlockBitCount,
+                            const unsigned zonePointerOffsetBitCount,
+                            const unsigned zonePointerBlockBitCount,
                             const block_t insertBlock,
                             Zone* zone,
                             std::optional<std::unique_ptr<ProgressCallback>> progressCallback)
             : m_entry_point_factory(std::move(entryPointFactory)),
               m_pointer_bit_count(pointerBitCount),
-              m_offset_block_bit_count(offsetBlockBitCount),
+              m_zone_pointer_offset_bit_count(zonePointerOffsetBitCount),
+              m_zone_pointer_block_bit_count(zonePointerBlockBitCount),
               m_insert_block(insertBlock),
               m_zone(zone),
               m_progress_callback(std::move(progressCallback))
@@ -31,8 +33,14 @@ namespace
             for (size_t i = 0; i < blockCount; ++i)
                 m_blocks.emplace_back(zoneMemory.GetBlock(i));
 
-            const auto inputStream = ZoneInputStream::Create(
-                m_pointer_bit_count, m_offset_block_bit_count, m_blocks, m_insert_block, stream, m_zone->Memory(), std::move(m_progress_callback));
+            const auto inputStream = ZoneInputStream::Create(m_pointer_bit_count,
+                                                             m_zone_pointer_offset_bit_count,
+                                                             m_zone_pointer_block_bit_count,
+                                                             m_blocks,
+                                                             m_insert_block,
+                                                             stream,
+                                                             m_zone->Memory(),
+                                                             std::move(m_progress_callback));
 
             const auto entryPoint = m_entry_point_factory(*inputStream);
             assert(entryPoint);
@@ -43,7 +51,8 @@ namespace
     private:
         std::function<std::unique_ptr<IContentLoadingEntryPoint>(ZoneInputStream&)> m_entry_point_factory;
         unsigned m_pointer_bit_count;
-        unsigned m_offset_block_bit_count;
+        unsigned m_zone_pointer_offset_bit_count;
+        unsigned m_zone_pointer_block_bit_count;
         block_t m_insert_block;
         Zone* m_zone;
         std::vector<XBlock*> m_blocks;
@@ -55,12 +64,13 @@ namespace step
 {
     std::unique_ptr<ILoadingStep> CreateStepLoadZoneContent(std::function<std::unique_ptr<IContentLoadingEntryPoint>(ZoneInputStream&)> entryPointFactory,
                                                             const unsigned pointerBitCount,
-                                                            const unsigned offsetBlockBitCount,
+                                                            const unsigned zonePointerOffsetBitCount,
+                                                            const unsigned zonePointerBlockBitCount,
                                                             const block_t insertBlock,
                                                             Zone* zone,
                                                             std::optional<std::unique_ptr<ProgressCallback>> progressCallback)
     {
         return std::make_unique<StepLoadZoneContent>(
-            std::move(entryPointFactory), pointerBitCount, offsetBlockBitCount, insertBlock, zone, std::move(progressCallback));
+            std::move(entryPointFactory), pointerBitCount, zonePointerOffsetBitCount, zonePointerBlockBitCount, insertBlock, zone, std::move(progressCallback));
     }
 } // namespace step
diff --git a/src/ZoneLoading/Loading/Steps/StepLoadZoneContent.h b/src/ZoneLoading/Loading/Steps/StepLoadZoneContent.h
index 52bc6ee9..c7bded9d 100644
--- a/src/ZoneLoading/Loading/Steps/StepLoadZoneContent.h
+++ b/src/ZoneLoading/Loading/Steps/StepLoadZoneContent.h
@@ -11,7 +11,8 @@ namespace step
 {
     std::unique_ptr<ILoadingStep> CreateStepLoadZoneContent(std::function<std::unique_ptr<IContentLoadingEntryPoint>(ZoneInputStream&)> entryPointFactory,
                                                             unsigned pointerBitCount,
-                                                            unsigned offsetBlockBitCount,
+                                                            unsigned zonePointerOffsetBitCount,
+                                                            unsigned zonePointerBlockBitCount,
                                                             block_t insertBlock,
                                                             Zone* zone,
                                                             std::optional<std::unique_ptr<ProgressCallback>> progressCallback);
diff --git a/src/ZoneLoading/Zone/Stream/ZoneInputStream.cpp b/src/ZoneLoading/Zone/Stream/ZoneInputStream.cpp
index 58b44655..678792ea 100644
--- a/src/ZoneLoading/Zone/Stream/ZoneInputStream.cpp
+++ b/src/ZoneLoading/Zone/Stream/ZoneInputStream.cpp
@@ -46,7 +46,8 @@ namespace
     {
     public:
         XBlockInputStream(const unsigned pointerBitCount,
-                          const unsigned blockBitCount,
+                          const unsigned zonePointerOffsetBitCount,
+                          const unsigned zonePointerBlockBitCount,
                           std::vector<XBlock*>& blocks,
                           const block_t insertBlock,
                           ILoadingStream& stream,
@@ -57,15 +58,17 @@ namespace
               m_stream(stream),
               m_memory(memory),
               m_pointer_byte_count(pointerBitCount / 8u),
-              m_block_mask((std::numeric_limits<uintptr_t>::max() >> (sizeof(uintptr_t) * 8 - blockBitCount)) << (pointerBitCount - blockBitCount)),
-              m_block_shift(pointerBitCount - blockBitCount),
-              m_offset_mask(std::numeric_limits<uintptr_t>::max() >> (sizeof(uintptr_t) * 8 - (pointerBitCount - blockBitCount))),
+              m_zone_pointer_block_mask((std::numeric_limits<uintptr_t>::max() >> (sizeof(uintptr_t) * 8 - zonePointerBlockBitCount))
+                                        << zonePointerOffsetBitCount),
+              m_zone_pointer_block_shift(zonePointerOffsetBitCount),
+              m_zone_pointer_offset_mask(std::numeric_limits<uintptr_t>::max() >> (sizeof(uintptr_t) * 8 - zonePointerOffsetBitCount)),
               m_last_fill_size(0),
               m_has_progress_callback(false),
               m_progress_current_size(0uz),
               m_progress_total_size(0uz)
         {
             assert(pointerBitCount % 8u == 0u);
+            assert(zonePointerOffsetBitCount + zonePointerBlockBitCount <= pointerBitCount);
             assert(insertBlock < static_cast<block_t>(blocks.size()));
 
             std::memset(m_block_offsets.data(), 0, sizeof(decltype(m_block_offsets)::value_type) * m_block_offsets.size());
@@ -292,7 +295,7 @@ namespace
 
             const auto blockNum = m_insert_block->m_index;
             const auto blockOffset = static_cast<uintptr_t>(m_block_offsets[m_insert_block->m_index]);
-            const auto zonePtr = (static_cast<uintptr_t>(blockNum) << m_block_shift) | (blockOffset & m_offset_mask);
+            const auto zonePtr = (static_cast<uintptr_t>(blockNum) << m_zone_pointer_block_shift) | (blockOffset & m_zone_pointer_offset_mask);
 
             IncBlockPos(*m_insert_block, m_pointer_byte_count);
 
@@ -301,7 +304,7 @@ namespace
 
         void SetInsertedPointerAliasLookup(const uintptr_t zonePtr, void* value) override
         {
-            assert((static_cast<block_t>((zonePtr & m_block_mask) >> m_block_shift)) < m_blocks.size());
+            assert((static_cast<block_t>((zonePtr & m_zone_pointer_block_mask) >> m_zone_pointer_block_shift)) < m_blocks.size());
             m_alias_redirect_lookup.emplace(zonePtr, value);
         }
 
@@ -311,8 +314,8 @@ namespace
             // So all offsets are moved by 1.
             const auto offsetInt = reinterpret_cast<uintptr_t>(offset) - 1u;
 
-            const auto blockNum = static_cast<block_t>((offsetInt & m_block_mask) >> m_block_shift);
-            const auto blockOffset = static_cast<size_t>(offsetInt & m_offset_mask);
+            const auto blockNum = static_cast<block_t>((offsetInt & m_zone_pointer_block_mask) >> m_zone_pointer_block_shift);
+            const auto blockOffset = static_cast<size_t>(offsetInt & m_zone_pointer_offset_mask);
 
             if (blockNum < 0 || blockNum >= static_cast<block_t>(m_blocks.size()))
                 throw InvalidOffsetBlockException(blockNum);
@@ -330,8 +333,8 @@ namespace
             // For details see ConvertOffsetToPointer
             const auto offsetInt = reinterpret_cast<uintptr_t>(offset) - 1u;
 
-            const auto blockNum = static_cast<block_t>((offsetInt & m_block_mask) >> m_block_shift);
-            const auto blockOffset = static_cast<size_t>(offsetInt & m_offset_mask);
+            const auto blockNum = static_cast<block_t>((offsetInt & m_zone_pointer_block_mask) >> m_zone_pointer_block_shift);
+            const auto blockOffset = static_cast<size_t>(offsetInt & m_zone_pointer_offset_mask);
 
             if (blockNum < 0 || blockNum >= static_cast<block_t>(m_blocks.size()))
                 throw InvalidOffsetBlockException(blockNum);
@@ -356,7 +359,7 @@ namespace
 
             const auto blockNum = block->m_index;
             const auto blockOffset = static_cast<uintptr_t>(static_cast<const uint8_t*>(blockPtr) - block->m_buffer.get());
-            const auto zonePtr = (static_cast<uintptr_t>(blockNum) << m_block_shift) | (blockOffset & m_offset_mask);
+            const auto zonePtr = (static_cast<uintptr_t>(blockNum) << m_zone_pointer_block_shift) | (blockOffset & m_zone_pointer_offset_mask);
             m_pointer_redirect_lookup.emplace(zonePtr, alias);
         }
 
@@ -365,8 +368,8 @@ namespace
             // For details see ConvertOffsetToPointer
             const auto offsetInt = reinterpret_cast<uintptr_t>(offset) - 1u;
 
-            const auto blockNum = static_cast<block_t>((offsetInt & m_block_mask) >> m_block_shift);
-            const auto blockOffset = static_cast<size_t>(offsetInt & m_offset_mask);
+            const auto blockNum = static_cast<block_t>((offsetInt & m_zone_pointer_block_mask) >> m_zone_pointer_block_shift);
+            const auto blockOffset = static_cast<size_t>(offsetInt & m_zone_pointer_offset_mask);
 
             if (blockNum < 0 || blockNum >= static_cast<block_t>(m_blocks.size()))
                 throw InvalidOffsetBlockException(blockNum);
@@ -388,8 +391,8 @@ namespace
             // For details see ConvertOffsetToPointer
             const auto offsetInt = reinterpret_cast<uintptr_t>(offset) - 1u;
 
-            const auto blockNum = static_cast<block_t>((offsetInt & m_block_mask) >> m_block_shift);
-            const auto blockOffset = static_cast<size_t>(offsetInt & m_offset_mask);
+            const auto blockNum = static_cast<block_t>((offsetInt & m_zone_pointer_block_mask) >> m_zone_pointer_block_shift);
+            const auto blockOffset = static_cast<size_t>(offsetInt & m_zone_pointer_offset_mask);
 
             if (blockNum < 0 || blockNum >= static_cast<block_t>(m_blocks.size()))
                 throw InvalidOffsetBlockException(blockNum);
@@ -496,9 +499,9 @@ namespace
         MemoryManager& m_memory;
 
         unsigned m_pointer_byte_count;
-        uintptr_t m_block_mask;
-        unsigned m_block_shift;
-        uintptr_t m_offset_mask;
+        uintptr_t m_zone_pointer_block_mask;
+        unsigned m_zone_pointer_block_shift;
+        uintptr_t m_zone_pointer_offset_mask;
         XBlock* m_insert_block;
 
         std::vector<uint8_t> m_fill_buffer;
@@ -515,12 +518,14 @@ namespace
 } // namespace
 
 std::unique_ptr<ZoneInputStream> ZoneInputStream::Create(const unsigned pointerBitCount,
-                                                         const unsigned blockBitCount,
+                                                         const unsigned zonePointerOffsetBitCount,
+                                                         const unsigned zonePointerBlockBitCount,
                                                          std::vector<XBlock*>& blocks,
                                                          const block_t insertBlock,
                                                          ILoadingStream& stream,
                                                          MemoryManager& memory,
                                                          std::optional<std::unique_ptr<ProgressCallback>> progressCallback)
 {
-    return std::make_unique<XBlockInputStream>(pointerBitCount, blockBitCount, blocks, insertBlock, stream, memory, std::move(progressCallback));
+    return std::make_unique<XBlockInputStream>(
+        pointerBitCount, zonePointerOffsetBitCount, zonePointerBlockBitCount, blocks, insertBlock, stream, memory, std::move(progressCallback));
 }
diff --git a/src/ZoneLoading/Zone/Stream/ZoneInputStream.h b/src/ZoneLoading/Zone/Stream/ZoneInputStream.h
index 2007d7fd..fdc76125 100644
--- a/src/ZoneLoading/Zone/Stream/ZoneInputStream.h
+++ b/src/ZoneLoading/Zone/Stream/ZoneInputStream.h
@@ -240,8 +240,21 @@ public:
     virtual void DebugOffsets(size_t assetIndex) const = 0;
 #endif
 
+    /**
+     * \brief Creates a new ZoneInputStream with given parameters.
+     * \param pointerBitCount The bit count of a pointer of the platform the zone data comes from.
+     * \param zonePointerBlockBitCount The bit count of the offset in a zone pointer. offsetBitCount + blockBitCount <= pointerBitCount
+     * \param zonePointerOffsetBitCount The bitcount of a block index in a zone pointer. offsetBitCount + blockBitCount <= pointerBitCount
+     * \param blocks The blocks of the zone.
+     * \param insertBlock The block index that is used when inserting a pointer. Should be the default normal block.
+     * \param stream The stream to load data from.
+     * \param memory The memory manager to use for allocating new memory.
+     * \param progressCallback An optional callback to call on progress.
+     * \return
+     */
     static std::unique_ptr<ZoneInputStream> Create(unsigned pointerBitCount,
-                                                   unsigned blockBitCount,
+                                                   unsigned zonePointerOffsetBitCount,
+                                                   unsigned zonePointerBlockBitCount,
                                                    std::vector<XBlock*>& blocks,
                                                    block_t insertBlock,
                                                    ILoadingStream& stream,
diff --git a/src/ZoneWriting/Game/IW3/ZoneWriterFactoryIW3.cpp b/src/ZoneWriting/Game/IW3/ZoneWriterFactoryIW3.cpp
index 8554bfd7..63f748b8 100644
--- a/src/ZoneWriting/Game/IW3/ZoneWriterFactoryIW3.cpp
+++ b/src/ZoneWriting/Game/IW3/ZoneWriterFactoryIW3.cpp
@@ -52,8 +52,12 @@ std::unique_ptr<ZoneWriter> ZoneWriterFactory::CreateWriter(const Zone& zone) co
 
     SetupBlocks(*writer);
 
-    auto contentInMemory = std::make_unique<StepWriteZoneContentToMemory>(
-        std::make_unique<ContentWriter>(zone), zone, 32u, ZoneConstants::OFFSET_BLOCK_BIT_COUNT, ZoneConstants::INSERT_BLOCK);
+    auto contentInMemory = std::make_unique<StepWriteZoneContentToMemory>(std::make_unique<ContentWriter>(zone),
+                                                                          zone,
+                                                                          32u,
+                                                                          ZoneConstants::ZONE_POINTER_OFFSET_BIT_COUNT,
+                                                                          ZoneConstants::ZONE_POINTER_BLOCK_BIT_COUNT,
+                                                                          ZoneConstants::INSERT_BLOCK);
     auto* contentInMemoryPtr = contentInMemory.get();
     writer->AddWritingStep(std::move(contentInMemory));
 
diff --git a/src/ZoneWriting/Game/IW4/ZoneWriterFactoryIW4.cpp b/src/ZoneWriting/Game/IW4/ZoneWriterFactoryIW4.cpp
index b65e6080..6b31ac50 100644
--- a/src/ZoneWriting/Game/IW4/ZoneWriterFactoryIW4.cpp
+++ b/src/ZoneWriting/Game/IW4/ZoneWriterFactoryIW4.cpp
@@ -67,8 +67,12 @@ std::unique_ptr<ZoneWriter> ZoneWriterFactory::CreateWriter(const Zone& zone) co
 
     SetupBlocks(*writer);
 
-    auto contentInMemory = std::make_unique<StepWriteZoneContentToMemory>(
-        std::make_unique<ContentWriter>(zone), zone, 32u, ZoneConstants::OFFSET_BLOCK_BIT_COUNT, ZoneConstants::INSERT_BLOCK);
+    auto contentInMemory = std::make_unique<StepWriteZoneContentToMemory>(std::make_unique<ContentWriter>(zone),
+                                                                          zone,
+                                                                          32u,
+                                                                          ZoneConstants::ZONE_POINTER_OFFSET_BIT_COUNT,
+                                                                          ZoneConstants::ZONE_POINTER_BLOCK_BIT_COUNT,
+                                                                          ZoneConstants::INSERT_BLOCK);
     auto* contentInMemoryPtr = contentInMemory.get();
     writer->AddWritingStep(std::move(contentInMemory));
 
diff --git a/src/ZoneWriting/Game/IW5/ZoneWriterFactoryIW5.cpp b/src/ZoneWriting/Game/IW5/ZoneWriterFactoryIW5.cpp
index 2721a139..c002697c 100644
--- a/src/ZoneWriting/Game/IW5/ZoneWriterFactoryIW5.cpp
+++ b/src/ZoneWriting/Game/IW5/ZoneWriterFactoryIW5.cpp
@@ -68,8 +68,12 @@ std::unique_ptr<ZoneWriter> ZoneWriterFactory::CreateWriter(const Zone& zone) co
 
     SetupBlocks(*writer);
 
-    auto contentInMemory = std::make_unique<StepWriteZoneContentToMemory>(
-        std::make_unique<ContentWriter>(zone), zone, 32u, ZoneConstants::OFFSET_BLOCK_BIT_COUNT, ZoneConstants::INSERT_BLOCK);
+    auto contentInMemory = std::make_unique<StepWriteZoneContentToMemory>(std::make_unique<ContentWriter>(zone),
+                                                                          zone,
+                                                                          32u,
+                                                                          ZoneConstants::ZONE_POINTER_OFFSET_BIT_COUNT,
+                                                                          ZoneConstants::ZONE_POINTER_BLOCK_BIT_COUNT,
+                                                                          ZoneConstants::INSERT_BLOCK);
     auto* contentInMemoryPtr = contentInMemory.get();
     writer->AddWritingStep(std::move(contentInMemory));
 
diff --git a/src/ZoneWriting/Game/QOS/ZoneWriterFactoryQOS.cpp b/src/ZoneWriting/Game/QOS/ZoneWriterFactoryQOS.cpp
index d5f817f3..54f4a7ed 100644
--- a/src/ZoneWriting/Game/QOS/ZoneWriterFactoryQOS.cpp
+++ b/src/ZoneWriting/Game/QOS/ZoneWriterFactoryQOS.cpp
@@ -54,8 +54,12 @@ std::unique_ptr<ZoneWriter> ZoneWriterFactory::CreateWriter(const Zone& zone) co
 
     SetupBlocks(*writer);
 
-    auto contentInMemory = std::make_unique<StepWriteZoneContentToMemory>(
-        std::make_unique<ContentWriter>(zone), zone, 32u, ZoneConstants::OFFSET_BLOCK_BIT_COUNT, ZoneConstants::INSERT_BLOCK);
+    auto contentInMemory = std::make_unique<StepWriteZoneContentToMemory>(std::make_unique<ContentWriter>(zone),
+                                                                          zone,
+                                                                          32u,
+                                                                          ZoneConstants::ZONE_POINTER_OFFSET_BIT_COUNT,
+                                                                          ZoneConstants::ZONE_POINTER_BLOCK_BIT_COUNT,
+                                                                          ZoneConstants::INSERT_BLOCK);
     auto* contentInMemoryPtr = contentInMemory.get();
     writer->AddWritingStep(std::move(contentInMemory));
 
diff --git a/src/ZoneWriting/Game/T4/ZoneWriterFactoryT4.cpp b/src/ZoneWriting/Game/T4/ZoneWriterFactoryT4.cpp
index d065bcd1..c99ffad2 100644
--- a/src/ZoneWriting/Game/T4/ZoneWriterFactoryT4.cpp
+++ b/src/ZoneWriting/Game/T4/ZoneWriterFactoryT4.cpp
@@ -50,8 +50,12 @@ std::unique_ptr<ZoneWriter> ZoneWriterFactory::CreateWriter(const Zone& zone) co
 
     SetupBlocks(*writer);
 
-    auto contentInMemory = std::make_unique<StepWriteZoneContentToMemory>(
-        std::make_unique<ContentWriter>(zone), zone, 32u, ZoneConstants::OFFSET_BLOCK_BIT_COUNT, ZoneConstants::INSERT_BLOCK);
+    auto contentInMemory = std::make_unique<StepWriteZoneContentToMemory>(std::make_unique<ContentWriter>(zone),
+                                                                          zone,
+                                                                          32u,
+                                                                          ZoneConstants::ZONE_POINTER_OFFSET_BIT_COUNT,
+                                                                          ZoneConstants::ZONE_POINTER_BLOCK_BIT_COUNT,
+                                                                          ZoneConstants::INSERT_BLOCK);
     auto* contentInMemoryPtr = contentInMemory.get();
     writer->AddWritingStep(std::move(contentInMemory));
 
diff --git a/src/ZoneWriting/Game/T5/ZoneWriterFactoryT5.cpp b/src/ZoneWriting/Game/T5/ZoneWriterFactoryT5.cpp
index 786d5488..ed6bc581 100644
--- a/src/ZoneWriting/Game/T5/ZoneWriterFactoryT5.cpp
+++ b/src/ZoneWriting/Game/T5/ZoneWriterFactoryT5.cpp
@@ -50,8 +50,12 @@ std::unique_ptr<ZoneWriter> ZoneWriterFactory::CreateWriter(const Zone& zone) co
 
     SetupBlocks(*writer);
 
-    auto contentInMemory = std::make_unique<StepWriteZoneContentToMemory>(
-        std::make_unique<ContentWriter>(zone), zone, 32u, ZoneConstants::OFFSET_BLOCK_BIT_COUNT, ZoneConstants::INSERT_BLOCK);
+    auto contentInMemory = std::make_unique<StepWriteZoneContentToMemory>(std::make_unique<ContentWriter>(zone),
+                                                                          zone,
+                                                                          32u,
+                                                                          ZoneConstants::ZONE_POINTER_OFFSET_BIT_COUNT,
+                                                                          ZoneConstants::ZONE_POINTER_BLOCK_BIT_COUNT,
+                                                                          ZoneConstants::INSERT_BLOCK);
     auto* contentInMemoryPtr = contentInMemory.get();
     writer->AddWritingStep(std::move(contentInMemory));
 
diff --git a/src/ZoneWriting/Game/T6/ZoneWriterFactoryT6.cpp b/src/ZoneWriting/Game/T6/ZoneWriterFactoryT6.cpp
index 60ed2c25..8ef45a68 100644
--- a/src/ZoneWriting/Game/T6/ZoneWriterFactoryT6.cpp
+++ b/src/ZoneWriting/Game/T6/ZoneWriterFactoryT6.cpp
@@ -106,8 +106,12 @@ std::unique_ptr<ZoneWriter> ZoneWriterFactory::CreateWriter(const Zone& zone) co
 
     SetupBlocks(*writer);
 
-    auto contentInMemory = std::make_unique<StepWriteZoneContentToMemory>(
-        std::make_unique<ContentWriter>(zone), zone, 32u, ZoneConstants::OFFSET_BLOCK_BIT_COUNT, ZoneConstants::INSERT_BLOCK);
+    auto contentInMemory = std::make_unique<StepWriteZoneContentToMemory>(std::make_unique<ContentWriter>(zone),
+                                                                          zone,
+                                                                          32u,
+                                                                          ZoneConstants::ZONE_POINTER_OFFSET_BIT_COUNT,
+                                                                          ZoneConstants::ZONE_POINTER_BLOCK_BIT_COUNT,
+                                                                          ZoneConstants::INSERT_BLOCK);
     auto* contentInMemoryPtr = contentInMemory.get();
     writer->AddWritingStep(std::move(contentInMemory));
 
diff --git a/src/ZoneWriting/Writing/Steps/StepWriteZoneContentToMemory.cpp b/src/ZoneWriting/Writing/Steps/StepWriteZoneContentToMemory.cpp
index 01cbc332..accb313e 100644
--- a/src/ZoneWriting/Writing/Steps/StepWriteZoneContentToMemory.cpp
+++ b/src/ZoneWriting/Writing/Steps/StepWriteZoneContentToMemory.cpp
@@ -5,13 +5,15 @@
 StepWriteZoneContentToMemory::StepWriteZoneContentToMemory(std::unique_ptr<IContentWritingEntryPoint> entryPoint,
                                                            const Zone& zone,
                                                            const unsigned pointerBitCount,
-                                                           const unsigned offsetBlockBitCount,
+                                                           const unsigned zonePointerOffsetBitCount,
+                                                           const unsigned zonePointerBlockBitCount,
                                                            const block_t insertBlock)
     : m_content_loader(std::move(entryPoint)),
       m_zone_data(std::make_unique<InMemoryZoneData>()),
       m_zone(zone),
       m_pointer_bit_count(pointerBitCount),
-      m_offset_block_bit_count(offsetBlockBitCount),
+      m_zone_pointer_offset_bit_count(zonePointerOffsetBitCount),
+      m_zone_pointer_block_bit_count(zonePointerBlockBitCount),
       m_insert_block(insertBlock)
 {
 }
@@ -22,7 +24,8 @@ void StepWriteZoneContentToMemory::PerformStep(ZoneWriter* zoneWriter, IWritingS
     for (const auto& block : zoneWriter->m_blocks)
         m_blocks.emplace_back(block.get());
 
-    const auto zoneOutputStream = ZoneOutputStream::Create(m_pointer_bit_count, m_offset_block_bit_count, m_blocks, m_insert_block, *m_zone_data);
+    const auto zoneOutputStream =
+        ZoneOutputStream::Create(m_pointer_bit_count, m_zone_pointer_offset_bit_count, m_zone_pointer_block_bit_count, m_blocks, m_insert_block, *m_zone_data);
     m_content_loader->WriteContent(*zoneOutputStream);
 }
 
diff --git a/src/ZoneWriting/Writing/Steps/StepWriteZoneContentToMemory.h b/src/ZoneWriting/Writing/Steps/StepWriteZoneContentToMemory.h
index 89f38ba7..5bacc6e5 100644
--- a/src/ZoneWriting/Writing/Steps/StepWriteZoneContentToMemory.h
+++ b/src/ZoneWriting/Writing/Steps/StepWriteZoneContentToMemory.h
@@ -9,8 +9,12 @@
 class StepWriteZoneContentToMemory final : public IWritingStep
 {
 public:
-    StepWriteZoneContentToMemory(
-        std::unique_ptr<IContentWritingEntryPoint> entryPoint, const Zone& zone, unsigned pointerBitCount, unsigned offsetBlockBitCount, block_t insertBlock);
+    StepWriteZoneContentToMemory(std::unique_ptr<IContentWritingEntryPoint> entryPoint,
+                                 const Zone& zone,
+                                 unsigned pointerBitCount,
+                                 unsigned zonePointerOffsetBitCount,
+                                 unsigned zonePointerBlockBitCount,
+                                 block_t insertBlock);
 
     void PerformStep(ZoneWriter* zoneWriter, IWritingStream* stream) override;
     [[nodiscard]] InMemoryZoneData* GetData() const;
@@ -22,6 +26,7 @@ private:
     std::vector<XBlock*> m_blocks;
 
     unsigned m_pointer_bit_count;
-    unsigned m_offset_block_bit_count;
+    unsigned m_zone_pointer_offset_bit_count;
+    unsigned m_zone_pointer_block_bit_count;
     block_t m_insert_block;
 };
diff --git a/src/ZoneWriting/Zone/Stream/ZoneOutputStream.cpp b/src/ZoneWriting/Zone/Stream/ZoneOutputStream.cpp
index 2075773a..0080c045 100644
--- a/src/ZoneWriting/Zone/Stream/ZoneOutputStream.cpp
+++ b/src/ZoneWriting/Zone/Stream/ZoneOutputStream.cpp
@@ -38,12 +38,19 @@ namespace
     class InMemoryZoneOutputStream final : public ZoneOutputStream
     {
     public:
-        InMemoryZoneOutputStream(
-            const unsigned pointerBitCount, const unsigned blockBitCount, std::vector<XBlock*>& blocks, const block_t insertBlock, InMemoryZoneData& zoneData)
+        InMemoryZoneOutputStream(const unsigned pointerBitCount,
+                                 const unsigned zonePointerOffsetBitCount,
+                                 const unsigned zonePointerBlockBitCount,
+                                 std::vector<XBlock*>& blocks,
+                                 const block_t insertBlock,
+                                 InMemoryZoneData& zoneData)
             : m_zone_data(zoneData),
               m_blocks(blocks),
-              m_block_bit_count(blockBitCount),
               m_pointer_byte_count(pointerBitCount / 8u),
+              m_zone_pointer_block_mask((std::numeric_limits<uintptr_t>::max() >> (sizeof(uintptr_t) * 8 - zonePointerBlockBitCount))
+                                        << zonePointerOffsetBitCount),
+              m_zone_pointer_block_shift(zonePointerOffsetBitCount),
+              m_zone_pointer_offset_mask(std::numeric_limits<uintptr_t>::max() >> (sizeof(uintptr_t) * 8 - zonePointerOffsetBitCount)),
 
               // -1
               m_zone_ptr_following(std::numeric_limits<std::uintptr_t>::max() >> ((sizeof(std::uintptr_t) * 8u) - pointerBitCount)),
@@ -52,6 +59,7 @@ namespace
               m_zone_ptr_insert((std::numeric_limits<std::uintptr_t>::max() >> ((sizeof(std::uintptr_t) * 8u) - pointerBitCount)) - 1u)
         {
             assert(pointerBitCount % 8u == 0u);
+            assert(zonePointerOffsetBitCount + zonePointerBlockBitCount <= pointerBitCount);
             assert(insertBlock < static_cast<block_t>(blocks.size()));
 
             m_insert_block = blocks[insertBlock];
@@ -288,8 +296,8 @@ namespace
             assert(m_block_stack.top()->m_type == XBlockType::BLOCK_TYPE_NORMAL);
 
             uintptr_t ptr = 0;
-            ptr |= static_cast<uintptr_t>(m_block_stack.top()->m_index) << (m_pointer_byte_count * 8 - m_block_bit_count);
-            ptr |= m_block_stack.top()->m_buffer_size & (UINTPTR_MAX >> (m_block_bit_count + (sizeof(uintptr_t) - m_pointer_byte_count) * 8));
+            ptr |= (static_cast<uintptr_t>(m_block_stack.top()->m_index) << m_zone_pointer_block_shift) & m_zone_pointer_block_mask;
+            ptr |= m_block_stack.top()->m_buffer_size & m_zone_pointer_offset_mask;
             ptr++;
 
             return ptr;
@@ -314,8 +322,10 @@ namespace
         std::stack<XBlock*> m_block_stack;
         std::stack<size_t> m_temp_sizes;
 
-        unsigned m_block_bit_count;
         unsigned m_pointer_byte_count;
+        uintptr_t m_zone_pointer_block_mask;
+        unsigned m_zone_pointer_block_shift;
+        uintptr_t m_zone_pointer_offset_mask;
         XBlock* m_insert_block;
 
         uintptr_t m_zone_ptr_following;
@@ -350,10 +360,14 @@ void* ZoneOutputOffset::Offset() const
     return m_offset;
 }
 
-std::unique_ptr<ZoneOutputStream>
-    ZoneOutputStream::Create(unsigned pointerBitCount, unsigned blockBitCount, std::vector<XBlock*>& blocks, block_t insertBlock, InMemoryZoneData& zoneData)
+std::unique_ptr<ZoneOutputStream> ZoneOutputStream::Create(const unsigned pointerBitCount,
+                                                           const unsigned zonePointerOffsetBitCount,
+                                                           const unsigned zonePointerBlockBitCount,
+                                                           std::vector<XBlock*>& blocks,
+                                                           const block_t insertBlock,
+                                                           InMemoryZoneData& zoneData)
 {
-    return std::make_unique<InMemoryZoneOutputStream>(pointerBitCount, blockBitCount, blocks, insertBlock, zoneData);
+    return std::make_unique<InMemoryZoneOutputStream>(pointerBitCount, zonePointerOffsetBitCount, zonePointerBlockBitCount, blocks, insertBlock, zoneData);
 }
 
 ZoneStreamFillWriteAccessor::ZoneStreamFillWriteAccessor(void* blockBuffer, const size_t bufferSize)
diff --git a/src/ZoneWriting/Zone/Stream/ZoneOutputStream.h b/src/ZoneWriting/Zone/Stream/ZoneOutputStream.h
index 34d9bcc7..7c1e816a 100644
--- a/src/ZoneWriting/Zone/Stream/ZoneOutputStream.h
+++ b/src/ZoneWriting/Zone/Stream/ZoneOutputStream.h
@@ -143,6 +143,10 @@ public:
         return WriteDataInBlock(dst, size);
     }
 
-    static std::unique_ptr<ZoneOutputStream>
-        Create(unsigned pointerBitCount, unsigned blockBitCount, std::vector<XBlock*>& blocks, block_t insertBlock, InMemoryZoneData& zoneData);
+    static std::unique_ptr<ZoneOutputStream> Create(unsigned pointerBitCount,
+                                                    unsigned zonePointerOffsetBitCount,
+                                                    unsigned zonePointerBlockBitCount,
+                                                    std::vector<XBlock*>& blocks,
+                                                    block_t insertBlock,
+                                                    InMemoryZoneData& zoneData);
 };