diff --git a/BMap/BMap.cpp b/BMap/BMap.cpp
index 509167b..fbd74ff 100644
--- a/BMap/BMap.cpp
+++ b/BMap/BMap.cpp
@@ -242,8 +242,11 @@ namespace BMap {
 				cache.emplace_back(encodings[i]);
 		}
 		m_Context->SetEncoding(cache);
+
 		// set default texture save mode is external
 		m_Context->SetGlobalImagesSaveOptions(LibCmo::CK2::CK_TEXTURE_SAVEOPTIONS::CKTEXTURE_EXTERNAL);
+		// set default file write mode is whole compressed
+		m_Context->SetFileWriteMode(LibCmo::CK2::CK_FILE_WRITEMODE::CKFILE_WHOLECOMPRESSED);
 	}
 
 	BMFile::~BMFile() {
@@ -257,16 +260,83 @@ namespace BMap {
 	bool BMFile::Load(LibCmo::CKSTRING filename) {
 		if (m_IsFreezed || !m_IsReader) return false;
 		
+		// create temp ckfile and load
+		LibCmo::CK2::CKFileReader reader(m_Context);
+		LibCmo::CK2::CKERROR err = reader.DeepLoad(filename);
+
+		// detect error
+		if (err != LibCmo::CK2::CKERROR::CKERR_OK) {
+			// failed. clear document and return false
+			m_Context->ClearAll();
+			return false;
+		}
+
+		// sync data list to our list
+		m_ObjGroups.clear();
+		m_Obj3dObjects.clear();
+		m_ObjMeshs.clear();
+		m_ObjMaterials.clear();
+		m_ObjTextures.clear();
+		for (const auto& fileobj : reader.GetFileObjects()) {
+			if (fileobj.ObjPtr == nullptr) continue;
+
+			switch (fileobj.ObjectCid) {
+				case LibCmo::CK2::CK_CLASSID::CKCID_GROUP:
+					m_ObjGroups.emplace_back(fileobj.CreatedObjectId);
+					break;
+				case LibCmo::CK2::CK_CLASSID::CKCID_3DOBJECT:
+					m_Obj3dObjects.emplace_back(fileobj.CreatedObjectId);
+					break;
+				case LibCmo::CK2::CK_CLASSID::CKCID_MESH:
+					m_ObjMeshs.emplace_back(fileobj.CreatedObjectId);
+					break;
+				case LibCmo::CK2::CK_CLASSID::CKCID_MATERIAL:
+					m_ObjMaterials.emplace_back(fileobj.CreatedObjectId);
+					break;
+				case LibCmo::CK2::CK_CLASSID::CKCID_TEXTURE:
+					m_ObjTextures.emplace_back(fileobj.CreatedObjectId);
+					break;
+			}
+		}
+
 		return true;
 	}
 
 	bool BMFile::Save(LibCmo::CKSTRING filename, LibCmo::CKINT compress_level) {
 		if (m_IsFreezed || m_IsReader) return false;
 
+		// create temp writer
+		LibCmo::CK2::CKFileWriter writer(m_Context);
+
+		// fill object data
+		for (const auto& id : m_ObjGroups) {
+			writer.AddSavedObject(m_Context->GetObject(id));
+		}
+		for (const auto& id : m_Obj3dObjects) {
+			writer.AddSavedObject(m_Context->GetObject(id));
+		}
+		for (const auto& id : m_ObjMeshs) {
+			writer.AddSavedObject(m_Context->GetObject(id));
+		}
+		for (const auto& id : m_ObjMaterials) {
+			writer.AddSavedObject(m_Context->GetObject(id));
+		}
+		for (const auto& id : m_ObjTextures) {
+			writer.AddSavedObject(m_Context->GetObject(id));
+		}
+
+		// set compress level
+		m_Context->SetCompressionLevel(compress_level);
+
+		// save to file and detect error
+		LibCmo::CK2::CKERROR err = writer.Save(filename);
+
 		// set freezed to stop any change again.
 		// aka, only allow save once.
 		m_IsFreezed = true;
-		return true;
+
+		// return with error detect.
+		return err == LibCmo::CK2::CKERROR::CKERR_OK;
 	}
 
 	LibCmo::CK2::ObjImpls::CKObject* BMFile::GetObjectPtr(LibCmo::CK2::CK_ID objid) {
diff --git a/LibCmo/VTUserAll.hpp b/LibCmo/VTUserAll.hpp
index ec9a793..9f00e17 100644
--- a/LibCmo/VTUserAll.hpp
+++ b/LibCmo/VTUserAll.hpp
@@ -9,6 +9,7 @@ Use VTAll.hpp for project internal including.
 #include "VTAll.hpp"
 #include "CK2/CKContext.hpp"
 #include "CK2/CKStateChunk.hpp"
+#include "CK2/CKFile.hpp"
 
 // Data handlers
 #include "CK2/DataHandlers/CKBitmapHandler.hpp"
diff --git a/Unvirt/StructFormatter.cpp b/Unvirt/StructFormatter.cpp
index 2f8a415..be023f1 100644
--- a/Unvirt/StructFormatter.cpp
+++ b/Unvirt/StructFormatter.cpp
@@ -122,7 +122,7 @@ namespace Unvirt::StructFormatter {
 
 		LibCmo::CKDWORD count = obj->GetObjectCount();
 		fprintf(stdout, "Group Object Count: %" PRIuCKDWORD "\n", count);
-		fputs("Id\tType\tObject Pointer\tName\n", stdout);
+		fputs("CKID\tType\tObject\tName\n", stdout);
 		for (LibCmo::CKDWORD i = 0; i < count; ++i) {
 			LibCmo::CK2::ObjImpls::CKBeObject* beobj = obj->GetObject(i);
 
diff --git a/Unvirt/UnvirtContext.cpp b/Unvirt/UnvirtContext.cpp
index 3f1809c..b46f6ea 100644
--- a/Unvirt/UnvirtContext.cpp
+++ b/Unvirt/UnvirtContext.cpp
@@ -617,6 +617,43 @@ namespace Unvirt::Context {
 	void Unvirt::Context::UnvirtContext::ProcTest(const CmdHelper::ArgumentsMap* amap) {
 #if defined(LIBCMO_BUILD_DEBUG)
 		// MARK: Add the debug code here.
+		
+		// todo: temporaryly write Transparent Column Fixer code.
+		// move to independent app in future.
+		
+		// check pre-requirement
+		if (!HasOpenedFile()) {
+			PrintCommonError("No loaded file.");
+			return;
+		}
+		if (!m_IsShallowRead) {
+			PrintCommonError("Transparent Column Fixer only accept shallow loaded file.");
+			return;
+		}
+
+		// iterate objects
+		LibCmo::CKDWORD expcode = static_cast<LibCmo::CKDWORD>(LibCmo::CK2::CK_STATESAVEFLAGS_TEXTURE::CK_STATESAVE_TEXONLY);
+		LibCmo::CKDWORD modcode = static_cast<LibCmo::CKDWORD>(LibCmo::CK2::CK_STATESAVEFLAGS_TEXTURE::CK_STATESAVE_OLDTEXONLY);
+		for (const auto& cobj : m_FileReader->GetFileObjects()) {
+			if (cobj.ObjectCid == LibCmo::CK2::CK_CLASSID::CKCID_TEXTURE && cobj.Data != nullptr) {
+				LibCmo::CK2::CKFileObject& obj = const_cast<LibCmo::CK2::CKFileObject&>(cobj);
+				obj.Data->StartRead();
+				auto chunkinfo = obj.Data->GetIdentifiersProfile();
+				obj.Data->StopRead();
+
+				// find CK_STATESAVE_TEXONLY and change it to CK_STATESAVE_OLDTEXONLY
+				for (const auto& entry : chunkinfo) {
+					if (entry.m_Identifier == expcode) {
+						LibCmo::CKDWORD* p = static_cast<LibCmo::CKDWORD*>(entry.m_DataPtr);
+						p -= 2;
+
+						if (*p == expcode) {
+							*p = modcode;
+						}
+					}
+				}
+			}
+		}
 
 #else
 		PrintCommonError("Test command only available in Debug mode.");
diff --git a/Unvirt/UnvirtContext.hpp b/Unvirt/UnvirtContext.hpp
index 1932e30..f7923ca 100644
--- a/Unvirt/UnvirtContext.hpp
+++ b/Unvirt/UnvirtContext.hpp
@@ -4,9 +4,7 @@
 #include "StructFormatter.hpp"
 #include "CmdHelper.hpp"
 
-#include <VTAll.hpp>
-#include <CK2/CKContext.hpp>
-#include <CK2/CKFile.hpp>
+#include <VTUserAll.hpp>
 
 #include <cstdio>
 #include <iostream>