diff --git a/toonz/sources/common/expressions/texpression.cpp b/toonz/sources/common/expressions/texpression.cpp
index 04f9303..f8d395d 100644
--- a/toonz/sources/common/expressions/texpression.cpp
+++ b/toonz/sources/common/expressions/texpression.cpp
@@ -46,7 +46,6 @@ TExpression::TExpression()
 
 TExpression::~TExpression()
 {
-	delete m_imp;
 }
 
 //--------------------------------------------------------------------------
diff --git a/toonz/sources/common/expressions/tgrammar.cpp b/toonz/sources/common/expressions/tgrammar.cpp
index 6d5de6b..f0d05bd 100644
--- a/toonz/sources/common/expressions/tgrammar.cpp
+++ b/toonz/sources/common/expressions/tgrammar.cpp
@@ -1319,7 +1319,6 @@ Grammar::Grammar()
 
 Grammar::~Grammar()
 {
-	delete m_imp;
 }
 
 void Grammar::addPattern(Pattern *pattern)
diff --git a/toonz/sources/common/expressions/tparser.cpp b/toonz/sources/common/expressions/tparser.cpp
index aecc98d..17140e4 100644
--- a/toonz/sources/common/expressions/tparser.cpp
+++ b/toonz/sources/common/expressions/tparser.cpp
@@ -92,7 +92,6 @@ Parser::Parser(const Grammar *grammar)
 
 Parser::~Parser()
 {
-	delete m_imp;
 }
 
 //-------------------------------------------------------------------
diff --git a/toonz/sources/common/tapptools/tcli.cpp b/toonz/sources/common/tapptools/tcli.cpp
index b73519c..baac4c5 100644
--- a/toonz/sources/common/tapptools/tcli.cpp
+++ b/toonz/sources/common/tapptools/tcli.cpp
@@ -785,13 +785,12 @@ void UsageImp::resetValues()
 //---------------------------------------------------------
 
 Usage::Usage(string progName)
+	: m_imp(new UsageImp(progName))
 {
-	m_imp = new UsageImp(progName);
 }
 
 Usage::~Usage()
 {
-	delete m_imp;
 }
 
 void Usage::add(const UsageLine &ul)
diff --git a/toonz/sources/common/tapptools/ttimer.cpp b/toonz/sources/common/tapptools/ttimer.cpp
index 8c7289c..0e631ee 100644
--- a/toonz/sources/common/tapptools/ttimer.cpp
+++ b/toonz/sources/common/tapptools/ttimer.cpp
@@ -292,15 +292,14 @@ public:
 //===============================================================================
 
 TTimer::TTimer(const string &name, UINT timerRes, Type type)
+	: m_imp(new TTimer::Imp(name, timerRes, type, this))
 {
-	m_imp = new TTimer::Imp(name, timerRes, type, this);
 }
 
 //--------------------------------------------------------------------------------
 
 TTimer::~TTimer()
 {
-	delete m_imp;
 }
 
 //--------------------------------------------------------------------------------
diff --git a/toonz/sources/common/tcache/timagecache.cpp b/toonz/sources/common/tcache/timagecache.cpp
index 3bed35c..7b139ef 100644
--- a/toonz/sources/common/tcache/timagecache.cpp
+++ b/toonz/sources/common/tcache/timagecache.cpp
@@ -1127,7 +1127,6 @@ TImageCache::~TImageCache()
 {
 	assert(check == magic);
 	check = -1;
-	delete m_imp;
 	CacheInstance = 0;
 }
 
diff --git a/toonz/sources/common/tcore/tundo.cpp b/toonz/sources/common/tcore/tundo.cpp
index ebfcc31..5cb4d38 100644
--- a/toonz/sources/common/tcore/tundo.cpp
+++ b/toonz/sources/common/tcore/tundo.cpp
@@ -174,7 +174,6 @@ TUndoManager *TUndoManager::manager()
 TUndoManager::TUndoManager()
 	: m_imp(new TUndoManagerImp)
 {
-	//  cout << "Creato undo manager" << endl;
 }
 
 //-----------------------------------------------------------------------------
@@ -184,7 +183,6 @@ TUndoManager::~TUndoManager()
 	//cout << "Distrutto undo manager" << endl;
 	assert(m_imp->m_blockStack.empty());
 	reset();
-	delete m_imp;
 }
 
 //-----------------------------------------------------------------------------
diff --git a/toonz/sources/common/tfx/tfx.cpp b/toonz/sources/common/tfx/tfx.cpp
index 02cfbea..293bb65 100644
--- a/toonz/sources/common/tfx/tfx.cpp
+++ b/toonz/sources/common/tfx/tfx.cpp
@@ -292,8 +292,7 @@ DEFINE_CLASS_CODE(TFx, 3)
 
 TFx::TFx()
 	: TSmartObject(m_classCode) // TPersist(TFxImp::m_instances)
-	  ,
-	  m_imp(new TFxImp(this))
+	, m_imp(new TFxImp(this))
 {
 }
 
diff --git a/toonz/sources/common/tfx/tfxcachemanager.cpp b/toonz/sources/common/tfx/tfxcachemanager.cpp
index 66ca963..786119d 100644
--- a/toonz/sources/common/tfx/tfxcachemanager.cpp
+++ b/toonz/sources/common/tfx/tfxcachemanager.cpp
@@ -162,8 +162,6 @@ TFxCacheManager::~TFxCacheManager()
 	std::set<std::string>::iterator it;
 	for (it = m_staticCacheIds.begin(); it != m_staticCacheIds.end(); ++it)
 		TImageCache::instance()->remove(*it);
-
-	delete m_imp;
 }
 
 //-----------------------------------------------------------------------------------
diff --git a/toonz/sources/common/tfx/tpredictivecachemanager.cpp b/toonz/sources/common/tfx/tpredictivecachemanager.cpp
index e432dec..3aa79c3 100644
--- a/toonz/sources/common/tfx/tpredictivecachemanager.cpp
+++ b/toonz/sources/common/tfx/tpredictivecachemanager.cpp
@@ -68,17 +68,29 @@ public:
 	QMutex m_mutex;
 
 public:
-	//Active getResource(..) callback
-	typedef void (TPredictiveCacheManager::Imp::*GetResourceFuncPtr)(TCacheResourceP &resource, const string &alias,
-																	 const TFxP &fx, double frame, const TRenderSettings &rs,
-																	 ResourceDeclaration *resData);
-
-	GetResourceFuncPtr m_getResFuncPtr;
-
-public:
 	Imp()
-		: m_renderStatus(TRenderer::IDLE), m_getResFuncPtr(&Imp::getResourceComputing), m_enabled(TRenderer::instance().isPrecomputingEnabled()) {}
+		: m_renderStatus(TRenderer::IDLE)
+		, m_enabled(TRenderer::instance().isPrecomputingEnabled())
+	{
+	}
 
+	void run(
+		TCacheResourceP &resource, const string &alias,
+			const TFxP &fx, double frame, const TRenderSettings &rs,
+			ResourceDeclaration *resData)
+	{
+		switch (m_renderStatus) {
+		case TRenderer::IDLE:
+		case TRenderer::COMPUTING:
+			getResourceComputing(resource, alias, fx, frame, rs, resData);
+			break;
+		case TRenderer::TESTRUN:
+			getResourceTestRun(resource, alias, fx, frame, rs, resData);
+			break;
+		}
+	}
+
+private:
 	void getResourceTestRun(
 		TCacheResourceP &resource, const string &alias,
 		const TFxP &fx, double frame, const TRenderSettings &rs,
@@ -103,7 +115,6 @@ TPredictiveCacheManager::TPredictiveCacheManager()
 
 TPredictiveCacheManager::~TPredictiveCacheManager()
 {
-	delete m_imp;
 }
 
 //---------------------------------------------------------------------------
@@ -128,7 +139,7 @@ void TPredictiveCacheManager::getResource(
 	if (!m_imp->m_enabled)
 		return;
 
-	(m_imp->*(m_imp->m_getResFuncPtr))(resource, alias, fx, frame, rs, resData);
+	m_imp->run(resource, alias, fx, frame, rs, resData);
 }
 
 //************************************************************************************************
@@ -207,11 +218,6 @@ void TPredictiveCacheManager::Imp::getResourceComputing(
 void TPredictiveCacheManager::onRenderStatusStart(int renderStatus)
 {
 	m_imp->m_renderStatus = renderStatus;
-	switch (renderStatus) {
-	case TRenderer::TESTRUN:
-		m_imp->m_getResFuncPtr = &TPredictiveCacheManager::Imp::getResourceTestRun;
-		CASE TRenderer::COMPUTING : m_imp->m_getResFuncPtr = &TPredictiveCacheManager::Imp::getResourceComputing;
-	}
 }
 
 //---------------------------------------------------------------------------
diff --git a/toonz/sources/common/tgl/tstencilcontrol.cpp b/toonz/sources/common/tgl/tstencilcontrol.cpp
index 57aaaeb..fae7e40 100644
--- a/toonz/sources/common/tgl/tstencilcontrol.cpp
+++ b/toonz/sources/common/tgl/tstencilcontrol.cpp
@@ -130,7 +130,6 @@ TStencilControl::TStencilControl()
 
 TStencilControl::~TStencilControl()
 {
-	delete m_imp;
 }
 
 //---------------------------------------------------------
diff --git a/toonz/sources/common/tmeshimage/tmeshimage.cpp b/toonz/sources/common/tmeshimage/tmeshimage.cpp
index da809c9..62b368d 100644
--- a/toonz/sources/common/tmeshimage/tmeshimage.cpp
+++ b/toonz/sources/common/tmeshimage/tmeshimage.cpp
@@ -330,8 +330,8 @@ TMeshImage::TMeshImage()
 
 //-----------------------------------------------------------------------
 
-TMeshImage::TMeshImage(Imp *imp)
-	: m_imp(imp)
+TMeshImage::TMeshImage(std::shared_ptr<Imp> imp)
+	: m_imp(std::move(imp))
 {
 }
 
@@ -339,7 +339,6 @@ TMeshImage::TMeshImage(Imp *imp)
 
 TMeshImage::~TMeshImage()
 {
-	delete m_imp;
 }
 
 //-----------------------------------------------------------------------
diff --git a/toonz/sources/common/tparam/tdoubleparam.cpp b/toonz/sources/common/tparam/tdoubleparam.cpp
index ca3770c..7c3813b 100644
--- a/toonz/sources/common/tparam/tdoubleparam.cpp
+++ b/toonz/sources/common/tparam/tdoubleparam.cpp
@@ -351,16 +351,16 @@ public:
 
 	~Imp() {}
 
-	void copy(Imp *src)
+	void copy(Imp& src)
 	{
-		m_grammar = src->m_grammar;
-		m_measureName = src->m_measureName;
-		m_measure = src->m_measure;
-		m_defaultValue = src->m_defaultValue;
-		m_minValue = src->m_minValue;
-		m_maxValue = src->m_maxValue;
-		m_keyframes = src->m_keyframes;
-		m_cycleEnabled = src->m_cycleEnabled;
+		m_grammar = src.m_grammar;
+		m_measureName = src.m_measureName;
+		m_measure = src.m_measure;
+		m_defaultValue = src.m_defaultValue;
+		m_minValue = src.m_minValue;
+		m_maxValue = src.m_maxValue;
+		m_keyframes = src.m_keyframes;
+		m_cycleEnabled = src.m_cycleEnabled;
 	}
 
 	void notify(const TParamChange &change)
@@ -496,14 +496,13 @@ TDoubleParam::TDoubleParam(double v)
 TDoubleParam::TDoubleParam(const TDoubleParam &src)
 	: TParam(src.getName()), m_imp(new TDoubleParam::Imp())
 {
-	m_imp->copy(src.m_imp);
+	m_imp->copy(*src.m_imp);
 }
 
 //---------------------------------------------------------
 
 TDoubleParam::~TDoubleParam()
 {
-	delete m_imp;
 }
 
 //---------------------------------------------------------
@@ -511,7 +510,7 @@ TDoubleParam::~TDoubleParam()
 TDoubleParam &TDoubleParam::operator=(const TDoubleParam &dp)
 {
 	setName(dp.getName());
-	m_imp->copy(dp.m_imp);
+	m_imp->copy(*dp.m_imp);
 	return *this;
 }
 
@@ -523,7 +522,7 @@ void TDoubleParam::copy(TParam *src)
 	if (!p)
 		throw TException("invalid source for copy");
 	setName(src->getName());
-	m_imp->copy(p->m_imp);
+	m_imp->copy(*p->m_imp);
 
 	m_imp->notify(TParamChange(this, 0, 0, true, false, false));
 }
diff --git a/toonz/sources/common/tparam/tnotanimatableparam.cpp b/toonz/sources/common/tparam/tnotanimatableparam.cpp
index 414a302..86fa65d 100644
--- a/toonz/sources/common/tparam/tnotanimatableparam.cpp
+++ b/toonz/sources/common/tparam/tnotanimatableparam.cpp
@@ -133,7 +133,7 @@ class TEnumParamImp
 {
 public:
 	vector<pair<int, string>> m_items;
-	void copy(TEnumParamImp *src)
+	void copy(std::unique_ptr<TEnumParamImp>& src)
 	{
 		m_items.clear();
 		std::back_insert_iterator<std::vector<pair<int, string>>> bii(m_items);
@@ -171,7 +171,6 @@ void TEnumParam::copy(TParam *src)
 
 TEnumParam::~TEnumParam()
 {
-	delete m_imp;
 }
 
 //---------------------------------------------------------
diff --git a/toonz/sources/common/tparam/tparamcontainer.cpp b/toonz/sources/common/tparam/tparamcontainer.cpp
index f489dbc..d58fa4c 100644
--- a/toonz/sources/common/tparam/tparamcontainer.cpp
+++ b/toonz/sources/common/tparam/tparamcontainer.cpp
@@ -37,7 +37,6 @@ TParamContainer::TParamContainer()
 
 TParamContainer::~TParamContainer()
 {
-	delete m_imp;
 }
 
 void TParamContainer::setParamObserver(TParamObserver *observer)
diff --git a/toonz/sources/common/tparam/tparamset.cpp b/toonz/sources/common/tparam/tparamset.cpp
index 49376de..7d6ef90 100644
--- a/toonz/sources/common/tparam/tparamset.cpp
+++ b/toonz/sources/common/tparam/tparamset.cpp
@@ -103,23 +103,22 @@ public:
 
 TParamSet::TParamSet(string name)
 	: TParam(name)
+	, m_imp(new TParamSetImp(this))
 {
-	m_imp = new TParamSetImp(this);
 }
 
 //---------------------------------------------------------
 
 TParamSet::TParamSet(const TParamSet &src)
 	: TParam(src.getName())
+	, m_imp(new TParamSetImp(this))
 {
-	m_imp = new TParamSetImp(this);
 }
 
 //---------------------------------------------------------
 
 TParamSet::~TParamSet()
 {
-	delete m_imp;
 }
 
 //---------------------------------------------------------
diff --git a/toonz/sources/common/tparam/tspectrumparam.cpp b/toonz/sources/common/tparam/tspectrumparam.cpp
index a55a88b..ee65526 100644
--- a/toonz/sources/common/tparam/tspectrumparam.cpp
+++ b/toonz/sources/common/tparam/tspectrumparam.cpp
@@ -113,9 +113,8 @@ PERSIST_IDENTIFIER(TSpectrumParam, "spectrumParam")
 
 //---------------------------------------------------------
 
-TSpectrumParam::TSpectrumParam()
+TSpectrumParam::TSpectrumParam(): m_imp(new TSpectrumParamImp(this)) //brutto...
 {
-	m_imp = new TSpectrumParamImp(this); //brutto...
 	ColorKeyParam ck1(TDoubleParamP(0.0), TPixelParamP(TPixel32::Black));
 	ColorKeyParam ck2(TDoubleParamP(1.0), TPixelParamP(TPixel32::White));
 	m_imp->addKey(ck1);
@@ -126,8 +125,8 @@ TSpectrumParam::TSpectrumParam()
 
 TSpectrumParam::TSpectrumParam(const TSpectrumParam &src)
 	: TParam(src.getName())
+	, m_imp(new TSpectrumParamImp(*src.m_imp))
 {
-	m_imp = new TSpectrumParamImp(*src.m_imp);
 }
 
 //---------------------------------------------------------
@@ -147,8 +146,8 @@ void TSpectrumParam::removeObserver(TParamObserver *obs)
 //---------------------------------------------------------
 
 TSpectrumParam::TSpectrumParam(int keyCount, TSpectrum::ColorKey keys[])
+	: m_imp(new TSpectrumParamImp(this))
 {
-	m_imp = new TSpectrumParamImp(this);
 	for (int i = 0; i < keyCount; i++) {
 		double v = keys[i].first;
 		TPixel32 pix = keys[i].second;
@@ -175,7 +174,6 @@ void TSpectrumParam::copy(TParam *src)
 
 TSpectrumParam::~TSpectrumParam()
 {
-	delete m_imp;
 }
 
 //---------------------------------------------------------
diff --git a/toonz/sources/common/trop/trop_borders.cpp b/toonz/sources/common/trop/trop_borders.cpp
index 4332afd..11baa40 100644
--- a/toonz/sources/common/trop/trop_borders.cpp
+++ b/toonz/sources/common/trop/trop_borders.cpp
@@ -201,7 +201,6 @@ ImageMeshesReader::ImageMeshesReader()
 
 ImageMeshesReader::~ImageMeshesReader()
 {
-	delete m_imp;
 }
 
 //--------------------------------------------------------------------------------
diff --git a/toonz/sources/common/tsound/tsound_nt.cpp b/toonz/sources/common/tsound/tsound_nt.cpp
index d1c8e94..80a4908 100644
--- a/toonz/sources/common/tsound/tsound_nt.cpp
+++ b/toonz/sources/common/tsound/tsound_nt.cpp
@@ -647,7 +647,6 @@ TSoundOutputDevice::~TSoundOutputDevice()
 	close();
 	WaitForSingleObject(m_imp->m_closeDevice, INFINITE);
 	CloseHandle(m_imp->m_closeDevice);
-	delete m_imp;
 }
 
 //------------------------------------------------------------------------------
@@ -1111,14 +1110,14 @@ void WinSoundInputDevice::stop()
 class RecordTask : public TThread::Runnable
 {
 public:
-	RecordTask(TSoundInputDeviceImp *dev)
-		: Runnable(), m_dev(dev) {}
+	RecordTask(std::shared_ptr<TSoundInputDeviceImp> dev)
+		: Runnable(), m_dev(std::move(dev)) {}
 
 	~RecordTask() {}
 
 	void run();
 
-	TSoundInputDeviceImp *m_dev;
+	std::shared_ptr<TSoundInputDeviceImp> m_dev;
 };
 
 #endif
@@ -1268,7 +1267,6 @@ TSoundInputDevice::TSoundInputDevice() : m_imp(new TSoundInputDeviceImp())
 
 TSoundInputDevice::~TSoundInputDevice()
 {
-	delete m_imp;
 }
 
 //------------------------------------------------------------------------------
diff --git a/toonz/sources/common/tstream/tstream.cpp b/toonz/sources/common/tstream/tstream.cpp
index 8e48833..bd4fb82 100644
--- a/toonz/sources/common/tstream/tstream.cpp
+++ b/toonz/sources/common/tstream/tstream.cpp
@@ -256,8 +256,8 @@ TOStream::TOStream(const TFilePath &fp, bool compressed)
 
 //---------------------------------------------------------------
 
-TOStream::TOStream(Imp *imp)
-	: m_imp(imp)
+TOStream::TOStream(std::shared_ptr<Imp> imp)
+	: m_imp(std::move(imp))
 {
 	assert(!imp->m_tagStack.empty());
 	ostream &os = *m_imp->m_os;
@@ -314,7 +314,6 @@ TOStream::~TOStream()
 			}
 			if (m_imp->m_chanOwner)
 				delete m_imp->m_os;
-			delete m_imp;
 		}
 	} catch (...) {
 	}
@@ -497,12 +496,11 @@ TOStream::operator bool() const
 }
 
 //---------------------------------------------------------------
-
 TOStream TOStream::child(string tagName)
 {
 	assert(tagName != "");
 	m_imp->m_tagStack.push_back(tagName);
-	return TOStream(m_imp);
+	return m_imp;
 }
 
 //---------------------------------------------------------------
@@ -981,7 +979,6 @@ TIStream::~TIStream()
 {
 	if (m_imp->m_chanOwner)
 		delete m_imp->m_is;
-	delete m_imp;
 }
 
 //---------------------------------------------------------------
diff --git a/toonz/sources/common/tsystem/tlogger.cpp b/toonz/sources/common/tsystem/tlogger.cpp
index 15411af..151c3bb 100644
--- a/toonz/sources/common/tsystem/tlogger.cpp
+++ b/toonz/sources/common/tsystem/tlogger.cpp
@@ -12,49 +12,6 @@
 
 using std::endl;
 
-/*
-class TLogger::Imp {
-public:
-  std::ofstream m_os;
-  TThread::Mutex m_mutex;
-
-  Imp(const TFilePath &fp) 
-  : m_os(toString(fp.getWideString()).c_str(), std::ios_base::out | std::ios_base::app)
-  , m_mutex()
-  {
-    TTime t = TSystem::getCurrentTime(); 
-    m_os << "========================" << std::endl;
-    m_os << t.getDate() << " " << t.getTime() << endl;
-    m_os << "Start logging" << endl << endl;
-  }
-};
-
-
-TLogger::TLogger()
-: m_imp(new Imp(TSystem::getTempDir() + "log.txt"))
-{
-}
-
-
-TLogger::~TLogger()
-{
-  delete m_imp;
-}
-
-TLogger *TLogger::instance()
-{
-  static TLogger _instance;
-  return &_instance;
-}
-
-
-void TLogger::print(string module, string msg)
-{
-  QMutexLocker sl(m_imp->m_mutex);
-  m_imp->m_os << module << " : " << msg << std::endl;
-}
-*/
-
 class TLogger::Imp
 {
 public:
@@ -96,7 +53,6 @@ TLogger::TLogger()
 
 TLogger::~TLogger()
 {
-	delete m_imp;
 }
 
 TLogger *TLogger::instance()
diff --git a/toonz/sources/common/tvectorimage/tl2lautocloser.cpp b/toonz/sources/common/tvectorimage/tl2lautocloser.cpp
index c058e85..f91ee2b 100644
--- a/toonz/sources/common/tvectorimage/tl2lautocloser.cpp
+++ b/toonz/sources/common/tvectorimage/tl2lautocloser.cpp
@@ -529,8 +529,6 @@ TL2LAutocloser::TL2LAutocloser()
 
 TL2LAutocloser::~TL2LAutocloser()
 {
-	delete m_imp;
-	m_imp = 0;
 }
 
 //-----------------------------------------------------------------------------
diff --git a/toonz/sources/common/tvectorimage/tl2lautocloser.h b/toonz/sources/common/tvectorimage/tl2lautocloser.h
index ec319a3..2a4cbbd 100644
--- a/toonz/sources/common/tvectorimage/tl2lautocloser.h
+++ b/toonz/sources/common/tvectorimage/tl2lautocloser.h
@@ -1,8 +1,8 @@
-
-
 #ifndef T_L2LAUTOCLOSER_H
 #define T_L2LAUTOCLOSER_H
 
+#include <memory>
+
 #include "tgeometry.h"
 
 #undef DVAPI
@@ -28,7 +28,7 @@ class TStroke;
 class DVAPI TL2LAutocloser
 {
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	TL2LAutocloser();
diff --git a/toonz/sources/common/tvectorimage/tregion.cpp b/toonz/sources/common/tvectorimage/tregion.cpp
index e1f3946..0b27899 100644
--- a/toonz/sources/common/tvectorimage/tregion.cpp
+++ b/toonz/sources/common/tvectorimage/tregion.cpp
@@ -144,7 +144,6 @@ TRegion::TRegion()
 
 TRegion::~TRegion()
 {
-	delete m_imp;
 }
 
 //-----------------------------------------------------------------------------
diff --git a/toonz/sources/common/tvectorimage/tstroke.cpp b/toonz/sources/common/tvectorimage/tstroke.cpp
index 999749d..9e306f9 100644
--- a/toonz/sources/common/tvectorimage/tstroke.cpp
+++ b/toonz/sources/common/tvectorimage/tstroke.cpp
@@ -1276,7 +1276,7 @@ TStroke::TStroke()
 	p[1] = p[0];
 	p[2] = p[1];
 
-	m_imp = new TStroke::Imp(p);
+	m_imp.reset(new TStroke::Imp(p));
 
 	/*
   // da fissare deve trovarsi prima della init
@@ -1289,32 +1289,30 @@ TStroke::TStroke()
 // Build a stroke from a set of ThickPoint
 TStroke::TStroke(const vector<TThickPoint> &v)
 	: TSmartObject(m_classCode)
+	, m_imp(new TStroke::Imp(v))
 {
-	m_imp = new TStroke::Imp(v);
 }
 
 //-----------------------------------------------------------------------------
 
 TStroke::TStroke(const vector<TPointD> &v)
 	: TSmartObject(m_classCode)
+	, m_imp(new TStroke::Imp(v))
 {
-	m_imp = new TStroke::Imp(v);
 }
 
 //-----------------------------------------------------------------------------
 
 TStroke::~TStroke()
 {
-	delete m_imp;
 }
 
 //-----------------------------------------------------------------------------
 
 TStroke::TStroke(const TStroke &other)
 	: TSmartObject(m_classCode)
+	, m_imp(new TStroke::Imp())
 {
-	m_imp = new TStroke::Imp();
-
 	m_imp->m_bBox = other.getBBox();
 	m_imp->m_isValidLength = other.m_imp->m_isValidLength;
 	m_imp->m_isOutlineValid = other.m_imp->m_isOutlineValid;
diff --git a/toonz/sources/common/tvectorimage/tvectorimage.cpp b/toonz/sources/common/tvectorimage/tvectorimage.cpp
index f6c3572..248f4d0 100644
--- a/toonz/sources/common/tvectorimage/tvectorimage.cpp
+++ b/toonz/sources/common/tvectorimage/tvectorimage.cpp
@@ -104,8 +104,8 @@ TVectorImage::Imp::~Imp()
 //=============================================================================
 
 TVectorImage::TVectorImage(bool loaded)
+	: m_imp(new TVectorImage::Imp(this))
 {
-	m_imp = new TVectorImage::Imp(this);
 	if (loaded)
 		m_imp->m_justLoaded = true;
 }
@@ -114,7 +114,6 @@ TVectorImage::TVectorImage(bool loaded)
 
 TVectorImage::~TVectorImage()
 {
-	delete m_imp;
 }
 
 //-----------------------------------------------------------------------------
diff --git a/toonz/sources/common/tvrender/tinbetween.cpp b/toonz/sources/common/tvrender/tinbetween.cpp
index 82e6ec0..f9d2c39 100644
--- a/toonz/sources/common/tvrender/tinbetween.cpp
+++ b/toonz/sources/common/tvrender/tinbetween.cpp
@@ -709,7 +709,6 @@ TInbetween::TInbetween(const TVectorImageP firstImage, const TVectorImageP lastI
 
 TInbetween::~TInbetween()
 {
-	delete m_imp;
 }
 
 //-------------------------------------------------------------------
diff --git a/toonz/sources/common/tvrender/tofflinegl.cpp b/toonz/sources/common/tvrender/tofflinegl.cpp
index 5ea9202..6ed5cd5 100644
--- a/toonz/sources/common/tvrender/tofflinegl.cpp
+++ b/toonz/sources/common/tvrender/tofflinegl.cpp
@@ -83,7 +83,7 @@ public:
 
 	//-----------------------------------------------------------------------------
 
-	WIN32Implementation(TDimension rasterSize, const TOfflineGL::Imp *shared = 0)
+	WIN32Implementation(TDimension rasterSize, std::shared_ptr<TOfflineGL::Imp> shared)
 		: TOfflineGL::Imp(rasterSize.lx, rasterSize.ly)
 	{
 		m_offData = 0;
@@ -157,7 +157,7 @@ public:
 
 	//-----------------------------------------------------------------------------
 
-	void createContext(TDimension rasterSize, const TOfflineGL::Imp *shared)
+	void createContext(TDimension rasterSize, std::shared_ptr<TOfflineGL::Imp> shared)
 	{
 		QMutexLocker locker(&win32ImpMutex);
 
@@ -221,7 +221,7 @@ public:
 
 		if (shared) {
 			// Share shared's display lists
-			const WIN32Implementation *sharedImp = dynamic_cast<const WIN32Implementation *>(shared);
+			const WIN32Implementation *sharedImp = dynamic_cast<const WIN32Implementation *>(shared.get());
 			assert(sharedImp);
 
 			bool ok = wglShareLists(sharedImp->m_hglRC, m_hglRC);
@@ -298,9 +298,9 @@ public:
 };
 
 // default imp generator
-TOfflineGL::Imp *defaultOfflineGLGenerator(const TDimension &dim, const TOfflineGL::Imp *shared)
+std::shared_ptr<TOfflineGL::Imp> defaultOfflineGLGenerator(const TDimension &dim, std::shared_ptr<TOfflineGL::Imp> shared)
 {
-	return new WIN32Implementation(dim, shared);
+	return std::make_shared<WIN32Implementation>(dim, shared);
 }
 
 //=============================================================================
@@ -502,16 +502,16 @@ public:
 	}
 };
 
-TOfflineGL::Imp *defaultOfflineGLGenerator(const TDimension &dim)
+std::shared_ptr<TOfflineGL::Imp> defaultOfflineGLGenerator(const TDimension &dim, std::shared_ptr<TOfflineGL::Imp> shared)
 {
-	return new XImplementation(dim);
+	return std::make_shared<XImplementation>(dim);
 }
 
 #elif MACOSX
 
-TOfflineGL::Imp *defaultOfflineGLGenerator(const TDimension &dim, const TOfflineGL::Imp *shared)
+std::shared_ptr<TOfflineGL::Imp> defaultOfflineGLGenerator(const TDimension &dim, std::shared_ptr<TOfflineGL::Imp> shared)
 {
-	return new QtOfflineGL(dim, shared);
+	return std::make_shared<QtOfflineGL>(dim, shared);
 }
 
 #endif
@@ -538,11 +538,11 @@ class MessageCreateContext : public TThread::Message
 
 	TOfflineGL *m_ogl;
 	TDimension m_size;
-	const TOfflineGL::Imp *m_shared;
+	std::shared_ptr<TOfflineGL::Imp> m_shared;
 
 public:
-	MessageCreateContext(TOfflineGL *ogl, const TDimension &size, const TOfflineGL::Imp *shared)
-		: m_ogl(ogl), m_size(size), m_shared(shared) {}
+	MessageCreateContext(TOfflineGL *ogl, const TDimension &size, std::shared_ptr<TOfflineGL::Imp> shared)
+		: m_ogl(ogl), m_size(size), m_shared(std::move(shared)) {}
 
 	void onDeliver()
 	{
@@ -560,19 +560,18 @@ public:
 //--------------------------------------------------
 
 TOfflineGL::TOfflineGL(TDimension dim, const TOfflineGL *shared)
-	: m_imp(0)
 {
 #if defined(LINUX)
 	XScopedLock xsl;
 #endif
 
-	const TOfflineGL::Imp *sharedImp = shared ? shared->m_imp : 0;
+	std::shared_ptr<Imp> sharedImp = shared ? shared->m_imp : 0;
 
 	/*
 	元のコードは(別スレッドから呼び出すための) offline renderer を作って main thread に dispatch するという訳のわからないことをしていたが Q*GLContext は thread context を超えられないので直接生成してこのコンテキストで閉じる.
 	別スレッドには dispatch しない.
    */
-	m_imp = currentImpGenerator(dim, sharedImp);
+	m_imp = currentImpGenerator(dim, std::move(sharedImp));
 
 	initMatrix();
 }
@@ -585,8 +584,6 @@ TOfflineGL::TOfflineGL(const TRaster32P &raster, const TOfflineGL *shared)
 	XScopedLock xsl;
 #endif
 
-	//m_imp = new Imp(raster->getSize());
-
 	m_imp = currentImpGenerator(raster->getSize(), shared->m_imp);
 
 	initMatrix();
@@ -601,7 +598,6 @@ TOfflineGL::TOfflineGL(const TRaster32P &raster, const TOfflineGL *shared)
 
 TOfflineGL::~TOfflineGL()
 {
-	delete m_imp;
 }
 
 //-----------------------------------------------------------------------------
diff --git a/toonz/sources/common/tvrender/tstrokedeformations.cpp b/toonz/sources/common/tvrender/tstrokedeformations.cpp
index f5c1591..0a36b5a 100644
--- a/toonz/sources/common/tvrender/tstrokedeformations.cpp
+++ b/toonz/sources/common/tvrender/tstrokedeformations.cpp
@@ -189,8 +189,8 @@ struct TStrokePointDeformation::Imp {
 
 TStrokePointDeformation::TStrokePointDeformation(const TPointD &center,
 												 double radius)
+												 : m_imp(new Imp(center, radius))
 {
-	m_imp = new Imp(center, radius);
 }
 
 //-----------------------------------------------------------------------------
@@ -198,15 +198,14 @@ TStrokePointDeformation::TStrokePointDeformation(const TPointD &center,
 TStrokePointDeformation::TStrokePointDeformation(const TPointD &vect,
 												 const TPointD &center,
 												 double radius)
+												 : m_imp(new Imp(vect, center, radius))
 {
-	m_imp = new Imp(vect, center, radius);
 }
 
 //-----------------------------------------------------------------------------
 
 TStrokePointDeformation::~TStrokePointDeformation()
 {
-	delete m_imp;
 }
 
 //-----------------------------------------------------------------------------
diff --git a/toonz/sources/include/ext/meshtexturizer.h b/toonz/sources/include/ext/meshtexturizer.h
index 5ade95e..99724e2 100644
--- a/toonz/sources/include/ext/meshtexturizer.h
+++ b/toonz/sources/include/ext/meshtexturizer.h
@@ -1,8 +1,8 @@
-
-
 #ifndef MESHTEXTURIZER_H
 #define MESHTEXTURIZER_H
 
+#include <memory>
+
 // TnzCore includes
 #include "traster.h"
 #include "tgl.h" // OpenGL includes
@@ -95,7 +95,7 @@ public:
 
 private:
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 private:
 	// Not copyable
diff --git a/toonz/sources/include/ext/plasticdeformer.h b/toonz/sources/include/ext/plasticdeformer.h
index 89ed713..726571d 100644
--- a/toonz/sources/include/ext/plasticdeformer.h
+++ b/toonz/sources/include/ext/plasticdeformer.h
@@ -1,8 +1,8 @@
-
-
 #ifndef PLASTICDEFORMER_H
 #define PLASTICDEFORMER_H
 
+#include <memory>
+
 // TnzCore includes
 #include "tgeometry.h"
 #include "tmeshimage.h"
@@ -42,7 +42,7 @@
 class DVAPI PlasticDeformer
 {
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	PlasticDeformer();
diff --git a/toonz/sources/include/ext/plasticdeformerstorage.h b/toonz/sources/include/ext/plasticdeformerstorage.h
index f5840df..36cab1b 100644
--- a/toonz/sources/include/ext/plasticdeformerstorage.h
+++ b/toonz/sources/include/ext/plasticdeformerstorage.h
@@ -1,8 +1,8 @@
-
-
 #ifndef PLASTIDEFORMERSTORAGE_H
 #define PLASTIDEFORMERSTORAGE_H
 
+#include <memory>
+
 // TnzExt includes
 #include "ext/plasticdeformer.h"
 
@@ -158,7 +158,7 @@ private:
 class DVAPI PlasticDeformerStorage
 {
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	enum DataType {
diff --git a/toonz/sources/include/ext/plasticskeleton.h b/toonz/sources/include/ext/plasticskeleton.h
index 64b4902..774ce79 100644
--- a/toonz/sources/include/ext/plasticskeleton.h
+++ b/toonz/sources/include/ext/plasticskeleton.h
@@ -1,8 +1,8 @@
-
-
 #ifndef PLASTICSKELETON_H
 #define PLASTICSKELETON_H
 
+#include <memory>
+
 // TnzCore includes
 #include "tsmartpointer.h"
 #include "tpersist.h"
@@ -102,7 +102,7 @@ class DVAPI PlasticSkeleton : public TSmartObject, public tcg::Mesh<PlasticSkele
 
 private:
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	typedef tcg::Mesh<PlasticSkeletonVertex, tcg::Edge, tcg::FaceN<3>> mesh_type;
diff --git a/toonz/sources/include/ext/plasticskeletondeformation.h b/toonz/sources/include/ext/plasticskeletondeformation.h
index 1301f94..17dad65 100644
--- a/toonz/sources/include/ext/plasticskeletondeformation.h
+++ b/toonz/sources/include/ext/plasticskeletondeformation.h
@@ -1,8 +1,8 @@
-
-
 #ifndef PLASTICSKELETONDEFORMATION_H
 #define PLASTICSKELETONDEFORMATION_H
 
+#include <memory>
+
 // TnzCore includes
 #include "tsmartpointer.h"
 #include "tdoubleparam.h"
@@ -139,7 +139,7 @@ class DVAPI PlasticSkeletonDeformation : public TSmartObject, public TPersist
 
 private:
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	typedef tcg::any_it<int, int, void *>::bidirectional skelId_iterator;
diff --git a/toonz/sources/include/permissionsmanager.h b/toonz/sources/include/permissionsmanager.h
index a317146..b8c1c11 100644
--- a/toonz/sources/include/permissionsmanager.h
+++ b/toonz/sources/include/permissionsmanager.h
@@ -1,8 +1,8 @@
-
-
 #ifndef PERMISSIONSMANAGER_INCLUDED
 #define PERMISSIONSMANAGER_INCLUDED
 
+#include <memory>
+
 // TnzCore includes
 #include "tcommon.h"
 
@@ -31,7 +31,7 @@ public:
 
 private:
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 private:
 	PermissionsManager();
diff --git a/toonz/sources/include/stdfx/shadingcontext.h b/toonz/sources/include/stdfx/shadingcontext.h
index de1eaea..6619395 100644
--- a/toonz/sources/include/stdfx/shadingcontext.h
+++ b/toonz/sources/include/stdfx/shadingcontext.h
@@ -1,8 +1,8 @@
-
-
 #ifndef SHADINGCONTEXT_H
 #define SHADINGCONTEXT_H
 
+#include <memory>
+
 // Glew include
 #include <GL/glew.h>
 
@@ -89,7 +89,7 @@ public:
 
 private:
 	struct Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 	// Not copyable
 	ShadingContext(const ShadingContext &);
diff --git a/toonz/sources/include/tcli.h b/toonz/sources/include/tcli.h
index 7b3dff8..5aa2f59 100644
--- a/toonz/sources/include/tcli.h
+++ b/toonz/sources/include/tcli.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TCLI_INCLUDED
 #define TCLI_INCLUDED
 
+#include <memory>
+
 //#include "tcommon.h"   contenuto in tconvert.h
 #include "tconvert.h"
 
@@ -342,7 +342,7 @@ class UsageImp;
 
 class DVAPI Usage
 {
-	UsageImp *m_imp;
+	std::unique_ptr<UsageImp> m_imp;
 
 public:
 	Usage(string progName);
diff --git a/toonz/sources/include/tdoubleparam.h b/toonz/sources/include/tdoubleparam.h
index 384d14f..3cc51f6 100644
--- a/toonz/sources/include/tdoubleparam.h
+++ b/toonz/sources/include/tdoubleparam.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TDOUBLEPARAM_H
 #define TDOUBLEPARAM_H
 
+#include <memory>
+
 // TnzCore includes
 #include "tgeometry.h"
 #include "tfilepath.h"
@@ -55,7 +55,7 @@ class DVAPI TDoubleParam : public TParam
 	PERSIST_DECLARATION(TDoubleParam)
 
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	TDoubleParam(double v = 0.0);
diff --git a/toonz/sources/include/texpression.h b/toonz/sources/include/texpression.h
index 996b8ea..c29fb36 100644
--- a/toonz/sources/include/texpression.h
+++ b/toonz/sources/include/texpression.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TEXPRESSION_INCLUDED
 #define TEXPRESSION_INCLUDED
 
+#include <memory>
+
 // TnzCore includes
 #include "tcommon.h"
 
@@ -47,7 +47,7 @@ class Calculator;
 class DVAPI TExpression
 {
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	TExpression();
diff --git a/toonz/sources/include/tfarmserver.h b/toonz/sources/include/tfarmserver.h
index ef1e6ee..3470f04 100644
--- a/toonz/sources/include/tfarmserver.h
+++ b/toonz/sources/include/tfarmserver.h
@@ -1,10 +1,8 @@
-
-
 #ifndef TFARMSERVER_H
 #define TFARMSERVER_H
 
-//#include "texception.h"
-//#include "tconvert.h"
+#include <memory>
+
 #include "tcommon.h"
 
 #include <QString>
@@ -87,7 +85,7 @@ public:
 
 private:
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 };
 
 #endif
diff --git a/toonz/sources/include/tfarmtask.h b/toonz/sources/include/tfarmtask.h
index b9d8f51..55d5c5e 100644
--- a/toonz/sources/include/tfarmtask.h
+++ b/toonz/sources/include/tfarmtask.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TFARMTASK_H
 #define TFARMTASK_H
 
+#include <memory>
+
 #include <qdatetime>
 #include "tpersist.h"
 #include "tfarmplatforms.h"
@@ -196,7 +196,7 @@ public:
 
 private:
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 };
 
 #endif
diff --git a/toonz/sources/include/tfx.h b/toonz/sources/include/tfx.h
index 2f77a36..4be1eaa 100644
--- a/toonz/sources/include/tfx.h
+++ b/toonz/sources/include/tfx.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TFX_INCLUDED
 #define TFX_INCLUDED
 
+#include <memory>
+
 // TnzCore includes
 #include "tsmartpointer.h"
 #include "tpersist.h"
diff --git a/toonz/sources/include/tfxcachemanager.h b/toonz/sources/include/tfxcachemanager.h
index d8ee3ab..e2ae865 100644
--- a/toonz/sources/include/tfxcachemanager.h
+++ b/toonz/sources/include/tfxcachemanager.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TFXCACHEMANAGER_H
 #define TFXCACHEMANAGER_H
 
+#include <memory>
+
 #include "trenderresourcemanager.h"
 #include "tcacheresource.h"
 
@@ -182,7 +182,7 @@ private:
 	std::set<std::string> m_staticCacheIds;
 
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	TFxCacheManager();
diff --git a/toonz/sources/include/tgrammar.h b/toonz/sources/include/tgrammar.h
index c0909b6..bf91dff 100644
--- a/toonz/sources/include/tgrammar.h
+++ b/toonz/sources/include/tgrammar.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TGRAMMAR_INCLUDED
 #define TGRAMMAR_INCLUDED
 
+#include <memory>
+
 // TnzCore includes
 #include "tcommon.h"
 
@@ -198,7 +198,7 @@ public:
 class DVAPI Grammar
 {
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	Grammar();
diff --git a/toonz/sources/include/timagecache.h b/toonz/sources/include/timagecache.h
index 98c15d2..ec44926 100644
--- a/toonz/sources/include/timagecache.h
+++ b/toonz/sources/include/timagecache.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TIMAGECACHE_H
 #define TIMAGECACHE_H
 
+#include <memory>
+
 // TnzCore includes
 #include "tcommon.h"
 #include "timage.h"
@@ -55,7 +55,7 @@ of system memory. This is especially true on 32-bit OSes.
 class DVAPI TImageCache
 {
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	static TImageCache *instance();
diff --git a/toonz/sources/include/tinbetween.h b/toonz/sources/include/tinbetween.h
index 467086f..28bebc9 100644
--- a/toonz/sources/include/tinbetween.h
+++ b/toonz/sources/include/tinbetween.h
@@ -1,9 +1,7 @@
-
-
 #ifndef TINBETWEEN_H
 #define TINBETWEEN_H
 
-//#include "tvectorimage.h"
+#include <memory>
 #include "tcommon.h"
 
 class TVectorImageP;
@@ -21,9 +19,8 @@ class TVectorImageP;
 
 class DVAPI TInbetween
 {
-
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	TInbetween(const TVectorImageP firstImage, const TVectorImageP lastImage);
diff --git a/toonz/sources/include/tlogger.h b/toonz/sources/include/tlogger.h
index 4c59de9..7932ec1 100644
--- a/toonz/sources/include/tlogger.h
+++ b/toonz/sources/include/tlogger.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TLOGGER_INCLUDED
 #define TLOGGER_INCLUDED
 
+#include <memory>
+
 //
 // TLogger
 //
@@ -34,7 +34,7 @@ class TFilePath;
 class DVAPI TLogger
 { // singleton
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 	TLogger();
 
diff --git a/toonz/sources/include/tmeshimage.h b/toonz/sources/include/tmeshimage.h
index a83d756..5c84e12 100644
--- a/toonz/sources/include/tmeshimage.h
+++ b/toonz/sources/include/tmeshimage.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TMESHIMAGE_INCLUDED
 #define TMESHIMAGE_INCLUDED
 
+#include <memory>
+
 // TnzCore includes
 #include "tsmartpointer.h"
 #include "tpersist.h"
@@ -172,14 +172,14 @@ struct graph_traits<TTextureMesh>
 class DVAPI TMeshImage : public TImage
 {
 	class Imp;
-	Imp *m_imp;
+	std::shared_ptr<Imp> m_imp;
 
 public:
 	typedef std::vector<TTextureMeshP> meshes_container;
 
 public:
 	TMeshImage();
-	TMeshImage(Imp *imp);
+	TMeshImage(std::shared_ptr<Imp> imp);
 	~TMeshImage();
 
 	TMeshImage(const TMeshImage &other);
diff --git a/toonz/sources/include/tnotanimatableparam.h b/toonz/sources/include/tnotanimatableparam.h
index 1f5ad86..b4cab57 100644
--- a/toonz/sources/include/tnotanimatableparam.h
+++ b/toonz/sources/include/tnotanimatableparam.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TNOTANIMATABLEPARAM_H
 #define TNOTANIMATABLEPARAM_H
 
+#include <memory>
+
 #include "tparam.h"
 #include "tparamchange.h"
 #include "tfilepath.h"
@@ -331,7 +331,7 @@ public:
 	void saveData(TOStream &os);
 
 private:
-	TEnumParamImp *m_imp;
+	std::unique_ptr<TEnumParamImp> m_imp;
 };
 
 typedef TEnumParam TIntEnumParam;
diff --git a/toonz/sources/include/tofflinegl.h b/toonz/sources/include/tofflinegl.h
index a7cf984..3049b8b 100644
--- a/toonz/sources/include/tofflinegl.h
+++ b/toonz/sources/include/tofflinegl.h
@@ -1,10 +1,8 @@
-
-
 #ifndef TOFFLINEGL_INCLUDED
 #define TOFFLINEGL_INCLUDED
 
-//#include "trasterimage.h"
-//#include "tvectorimage.h"
+#include <memory>
+
 #include "tgl.h"
 
 #undef DVAPI
@@ -47,12 +45,12 @@ public:
 		virtual ~Imp(){};
 		virtual void makeCurrent() = 0;
 		virtual void doneCurrent() = 0; // Da implementare in Imp
-		virtual void createContext(TDimension rasterSize, const TOfflineGL::Imp *shared) = 0;
+		virtual void createContext(TDimension rasterSize, std::shared_ptr<Imp> shared) = 0;
 		virtual void getRaster(TRaster32P) = 0;
 		virtual int getLx() const { return m_lx; }
 		virtual int getLy() const { return m_ly; }
 	};
-	typedef Imp *ImpGenerator(const TDimension &dim, const TOfflineGL::Imp *shared);
+	typedef std::shared_ptr<Imp> ImpGenerator(const TDimension &dim, std::shared_ptr<Imp> shared);
 	static ImpGenerator *defineImpGenerator(ImpGenerator *impGenerator);
 
 	TOfflineGL(TDimension dim, const TOfflineGL *shared = 0);
@@ -87,7 +85,7 @@ public:
 	static TOfflineGL *getStock(TDimension dim);
 	// si usa cosi': TOfflineGL *ogl = TOfflineGL::getStock(d);
 	// non bisogna liberare ogl
-	Imp *m_imp;
+	std::shared_ptr<Imp> m_imp;
 
 private:
 private:
diff --git a/toonz/sources/include/toonz/autoclose.h b/toonz/sources/include/toonz/autoclose.h
index 1d67bdc..3465d50 100644
--- a/toonz/sources/include/toonz/autoclose.h
+++ b/toonz/sources/include/toonz/autoclose.h
@@ -1,8 +1,8 @@
-
-
 #ifndef _TAUTOCLOSE_H_
 #define _TAUTOCLOSE_H_
 
+#include <memory>
+
 #include "tgeometry.h"
 #include "traster.h"
 
@@ -35,7 +35,7 @@ public:
 
 private:
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 	//not implemented
 	TAutocloser();
diff --git a/toonz/sources/include/toonz/imagemanager.h b/toonz/sources/include/toonz/imagemanager.h
index a8b9e78..273c056 100644
--- a/toonz/sources/include/toonz/imagemanager.h
+++ b/toonz/sources/include/toonz/imagemanager.h
@@ -1,8 +1,8 @@
-
-
 #ifndef IMAGEMANAGER_H
 #define IMAGEMANAGER_H
 
+#include <memory>
+
 // TnzCore includes
 #include "timage.h"
 #include "timageinfo.h"
@@ -170,7 +170,7 @@ public:
 
 private:
 	struct Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 private:
 	ImageManager();
diff --git a/toonz/sources/include/toonz/tlog.h b/toonz/sources/include/toonz/tlog.h
index f2a1b3d..3f3fc16 100644
--- a/toonz/sources/include/toonz/tlog.h
+++ b/toonz/sources/include/toonz/tlog.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TSYSLOG_H
 #define TSYSLOG_H
 
+#include <memory>
+
 #include "tcommon.h"
 class TFilePath;
 
@@ -39,7 +39,7 @@ public:
 
 private:
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 };
 
 #endif
diff --git a/toonz/sources/include/toonz/tstageobjecttree.h b/toonz/sources/include/toonz/tstageobjecttree.h
index 1d852a8..575e0a2 100644
--- a/toonz/sources/include/toonz/tstageobjecttree.h
+++ b/toonz/sources/include/toonz/tstageobjecttree.h
@@ -1,8 +1,8 @@
-
-
 #ifndef T_STAGE_OBJECT_TREE_INCLUDED
 #define T_STAGE_OBJECT_TREE_INCLUDED
 
+#include <memory>
+
 #include "toonz/tstageobject.h"
 
 #undef DVAPI
@@ -70,7 +70,7 @@ class DVAPI TStageObjectTree : public TPersist
 {
 	PERSIST_DECLARATION(TStageObjectTree)
 	struct TStageObjectTreeImp;
-	TStageObjectTreeImp *m_imp;
+	std::unique_ptr<TStageObjectTreeImp> m_imp;
 
 	//  usato solo sotto #ifndef NDEBUG
 	void checkIntegrity();
diff --git a/toonz/sources/include/toonz/txsheet.h b/toonz/sources/include/toonz/txsheet.h
index 8b5cfb4..ee91d06 100644
--- a/toonz/sources/include/toonz/txsheet.h
+++ b/toonz/sources/include/toonz/txsheet.h
@@ -1,8 +1,8 @@
-
-
 #ifndef XSHEET_INCLUDED
 #define XSHEET_INCLUDED
 
+#include <memory>
+
 // TnzCore includes
 #include "traster.h"
 #include "tpersist.h"
@@ -118,7 +118,7 @@ private:
 	The TXsheetImp struct provides all objects necessary to define the \b TXsheet class.
 */
 	struct TXsheetImp;
-	TXsheetImp *m_imp;
+	std::unique_ptr<TXsheetImp> m_imp;
 	TXshNoteSet *m_notes;
 	SoundProperties *m_soundProperties;
 
diff --git a/toonz/sources/include/toonzqt/infoviewer.h b/toonz/sources/include/toonzqt/infoviewer.h
index 36638b9..a8286db 100644
--- a/toonz/sources/include/toonzqt/infoviewer.h
+++ b/toonz/sources/include/toonzqt/infoviewer.h
@@ -1,8 +1,8 @@
-
-
 #ifndef INFOVIEWER_H
 #define INFOVIEWER_H
 
+#include <memory>
+
 #include "toonzqt/dvdialog.h"
 
 #undef DVAPI
@@ -23,7 +23,7 @@ class InfoViewerImp;
 class DVAPI InfoViewer : public DVGui::Dialog
 {
 	Q_OBJECT
-	InfoViewerImp *m_imp;
+	std::unique_ptr<InfoViewerImp> m_imp;
 	QWidget *m_parent;
 
 public:
diff --git a/toonz/sources/include/tparamcontainer.h b/toonz/sources/include/tparamcontainer.h
index 49deaa0..570ac68 100644
--- a/toonz/sources/include/tparamcontainer.h
+++ b/toonz/sources/include/tparamcontainer.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TPARAMCONTAINER_INCLUDED
 #define TPARAMCONTAINER_INCLUDED
 
+#include <memory>
+
 #include "tparam.h"
 //#include "tfx.h"
 #include "tcommon.h"
@@ -69,7 +69,7 @@ public:
 class DVAPI TParamContainer
 {
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	TParamContainer();
diff --git a/toonz/sources/include/tparser.h b/toonz/sources/include/tparser.h
index 5fb0e2e..4b8a093 100644
--- a/toonz/sources/include/tparser.h
+++ b/toonz/sources/include/tparser.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TPARSER_INCLUDED
 #define TPARSER_INCLUDED
 
+#include <memory>
+
 #include "tcommon.h"
 #include "tgrammar.h"
 
@@ -27,7 +27,7 @@ struct DVAPI SyntaxToken {
 class DVAPI Parser
 {
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	Parser(const Grammar *grammar);
diff --git a/toonz/sources/include/tpredictivecachemanager.h b/toonz/sources/include/tpredictivecachemanager.h
index b3a8bf2..bdf0a7c 100644
--- a/toonz/sources/include/tpredictivecachemanager.h
+++ b/toonz/sources/include/tpredictivecachemanager.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TPREDICTIVECACHEMANAGER_H
 #define TPREDICTIVECACHEMANAGER_H
 
+#include <memory>
+
 #include "tfxcachemanager.h"
 
 #include "tgeometry.h"
@@ -35,7 +35,7 @@ class DVAPI TPredictiveCacheManager
 	T_RENDER_RESOURCE_MANAGER
 
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	TPredictiveCacheManager();
diff --git a/toonz/sources/include/tregion.h b/toonz/sources/include/tregion.h
index 56568f3..2ac3e02 100644
--- a/toonz/sources/include/tregion.h
+++ b/toonz/sources/include/tregion.h
@@ -1,11 +1,11 @@
-
-
 //-----------------------------------------------------------------------------
 // tregion.h: interface for the TRegion class.
 //-----------------------------------------------------------------------------
 #if !defined(TREGION_H)
 #define TREGION_H
 
+#include <memory>
+
 #if _MSC_VER > 1000
 #pragma once
 #endif // _MSC_VER > 1000
@@ -165,7 +165,7 @@ typedef TSmartPointerT<TEdge> TEdgeP;
 class DVAPI TRegion
 {
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	TRegion();
diff --git a/toonz/sources/include/trop_borders.h b/toonz/sources/include/trop_borders.h
index ef75e63..c58359e 100644
--- a/toonz/sources/include/trop_borders.h
+++ b/toonz/sources/include/trop_borders.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TROP_BORDERS_H
 #define TROP_BORDERS_H
 
+#include <memory>
+
 // TnzCore includes
 #include "tsmartpointer.h"
 #include "tgeometry.h"
@@ -159,7 +159,7 @@ typedef TSmartPointerT<ImageMesh> ImageMeshP;
 class DVAPI ImageMeshesReader
 {
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	ImageMeshesReader();
diff --git a/toonz/sources/include/tsmartpointer.h b/toonz/sources/include/tsmartpointer.h
index 8133dcd..346f1c0 100644
--- a/toonz/sources/include/tsmartpointer.h
+++ b/toonz/sources/include/tsmartpointer.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TSMARTPOINTER_INCLUDED
 #define TSMARTPOINTER_INCLUDED
 
+#include <memory>
+
 #include "tutil.h"
 #include "tatomicvar.h"
 
@@ -115,7 +115,7 @@ class DVAPI TSmartPointerT
 {
 
 protected:
-	T *m_pointer;
+	T* m_pointer;
 
 public:
 	TSmartPointerT() : m_pointer(0) {}
@@ -126,7 +126,7 @@ public:
 			m_pointer->addRef();
 	}
 
-	TSmartPointerT(T *pointer) : m_pointer(pointer)
+	TSmartPointerT(T* pointer) : m_pointer(pointer)
 	{
 		if (m_pointer)
 			m_pointer->addRef();
diff --git a/toonz/sources/include/tsound.h b/toonz/sources/include/tsound.h
index 0cd52da..8f3b543 100644
--- a/toonz/sources/include/tsound.h
+++ b/toonz/sources/include/tsound.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TSOUND_INCLUDED
 #define TSOUND_INCLUDED
 
+#include <memory>
+
 #include "tsmartpointer.h"
 #include "texception.h"
 #include "tthreadmessage.h"
@@ -285,7 +285,7 @@ class TSoundInputDeviceImp;
 */
 class DVAPI TSoundInputDevice
 {
-	TSoundInputDeviceImp *m_imp;
+	std::shared_ptr<TSoundInputDeviceImp> m_imp;
 
 public:
 	enum Source {
@@ -360,7 +360,7 @@ class TSoundOutputDeviceImp;
 */
 class DVAPI TSoundOutputDevice
 {
-	TSoundOutputDeviceImp *m_imp;
+	std::unique_ptr<TSoundOutputDeviceImp> m_imp;
 
 public:
 	TSoundOutputDevice();
diff --git a/toonz/sources/include/tspectrumparam.h b/toonz/sources/include/tspectrumparam.h
index 31be476..6ea7433 100644
--- a/toonz/sources/include/tspectrumparam.h
+++ b/toonz/sources/include/tspectrumparam.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TSPECTRUMPARAM_H
 #define TSPECTRUMPARAM_H
 
+#include <memory>
+
 #include "tspectrum.h"
 #include "tparamset.h"
 
@@ -37,7 +37,7 @@ class DVAPI TSpectrumParam : public TParam
 {
 	PERSIST_DECLARATION(TSpectrumParam)
 
-	TSpectrumParamImp *m_imp;
+	std::unique_ptr<TSpectrumParamImp> m_imp;
 
 public:
 	TSpectrumParam();
diff --git a/toonz/sources/include/tstencilcontrol.h b/toonz/sources/include/tstencilcontrol.h
index f8f45c4..4eb63c9 100644
--- a/toonz/sources/include/tstencilcontrol.h
+++ b/toonz/sources/include/tstencilcontrol.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TSTENCILCONTROL_H
 #define TSTENCILCONTROL_H
 
+#include <memory>
+
 #include "tcommon.h"
 
 #undef DVAPI
@@ -34,7 +34,7 @@ public:
 
 private:
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	static TStencilControl *instance();
diff --git a/toonz/sources/include/tstream.h b/toonz/sources/include/tstream.h
index ddb5cbd..7f85a64 100644
--- a/toonz/sources/include/tstream.h
+++ b/toonz/sources/include/tstream.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TSTREAM_H
 #define TSTREAM_H
 
+#include <memory>
+
 // TnzCore includes
 #include "tpixel.h"
 
@@ -44,7 +44,7 @@ typedef std::pair<int, int> VersionNumber; //!< Integer pair storing the major a
 class DVAPI TIStream
 {
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	/*!
@@ -168,10 +168,10 @@ TIStream &operator>>(TIStream &is, T *&v)
 class DVAPI TOStream
 {
 	class Imp;
-	Imp *m_imp;
+	std::shared_ptr<Imp> m_imp;
 
 private:
-	TOStream(Imp *imp); //!< deprecated
+	TOStream(std::shared_ptr<Imp> imp); //!< deprecated
 
 public:
 	/*!
@@ -238,8 +238,8 @@ public:
 
 private:
 	// Not copyable
-	TOStream(const TOStream &);			   //!< Not implemented
-	TOStream &operator=(const TOStream &); //!< Not implemented
+	TOStream(const TOStream &) = delete;			      //!< Not implemented
+	TOStream &operator=(const TOStream &) = delete; //!< Not implemented
 };
 
 #endif // TSTREAM_H
diff --git a/toonz/sources/include/tstroke.h b/toonz/sources/include/tstroke.h
index 2a93848..9d739d5 100644
--- a/toonz/sources/include/tstroke.h
+++ b/toonz/sources/include/tstroke.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TSTROKE_H
 #define TSTROKE_H
 
+#include <memory>
+
 #include "tsmartpointer.h"
 #include "tgeometry.h"
 #include "tthreadmessage.h"
@@ -50,7 +50,7 @@ class DVAPI TStroke : public TSmartObject
 private:
 	//! Pimpl of a TStroke
 	struct Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	struct OutlineOptions;
diff --git a/toonz/sources/include/ttcpip.h b/toonz/sources/include/ttcpip.h
index 693dd15..adfcb6a 100644
--- a/toonz/sources/include/ttcpip.h
+++ b/toonz/sources/include/ttcpip.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TTCPIP_H
 #define TTCPIP_H
 
+#include <memory>
+
 #include "tcommon.h"
 
 #include <QString>
@@ -48,7 +48,7 @@ public:
 	int getExitCode() const;
 
 private:
-	TTcpIpServerImp *m_imp;
+	std::shared_ptr<TTcpIpServerImp> m_imp;
 };
 
 //---------------------------------------------------------------------
diff --git a/toonz/sources/include/ttimer.h b/toonz/sources/include/ttimer.h
index 2de2d26..4aaa949 100644
--- a/toonz/sources/include/ttimer.h
+++ b/toonz/sources/include/ttimer.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TTIMER_INCLUDED
 #define TTIMER_INCLUDED
 
+#include <memory>
+
 #include "tcommon.h"
 
 #undef DVAPI
@@ -98,7 +98,7 @@ public:
 	class Imp;
 
 private:
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 	TTimer(const TTimer &);
 	void operator=(const TTimer &);
diff --git a/toonz/sources/include/tundo.h b/toonz/sources/include/tundo.h
index df58017..d0f5715 100644
--- a/toonz/sources/include/tundo.h
+++ b/toonz/sources/include/tundo.h
@@ -1,8 +1,8 @@
-
-
 #ifndef T_UNDO_INCLUDED
 #define T_UNDO_INCLUDED
 
+#include <memory>
+
 // TnzCore includes
 #include "tsmartpointer.h"
 
@@ -103,7 +103,7 @@ public:
 
 private:
 	struct TUndoManagerImp;
-	TUndoManagerImp *m_imp;
+	std::unique_ptr<TUndoManagerImp> m_imp;
 
 private:
 	// Noncopyable
diff --git a/toonz/sources/include/tvectorimage.h b/toonz/sources/include/tvectorimage.h
index 8fb1234..f80f239 100644
--- a/toonz/sources/include/tvectorimage.h
+++ b/toonz/sources/include/tvectorimage.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TVECTORIMAGE_INCLUDED
 #define TVECTORIMAGE_INCLUDED
 
+#include <memory>
+
 #include "timage.h"
 
 // da togliere spostando cose in altri file!!
@@ -60,7 +60,7 @@ class DVAPI TVectorImage : public TImage
 	int pickGroup(const TPointD &pos, bool onEnteredGroup) const;
 
 public:
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 	struct IntersectionBranch {
 		int m_strokeIndex;
diff --git a/toonz/sources/stdfx/shadingcontext.cpp b/toonz/sources/stdfx/shadingcontext.cpp
index 2a82a5b..c26fe32 100644
--- a/toonz/sources/stdfx/shadingcontext.cpp
+++ b/toonz/sources/stdfx/shadingcontext.cpp
@@ -120,7 +120,6 @@ ShadingContext::ShadingContext()
 
 ShadingContext::~ShadingContext()
 {
-	delete m_imp;
 }
 
 //--------------------------------------------------------
diff --git a/toonz/sources/tnzbase/permissionsmanager.cpp b/toonz/sources/tnzbase/permissionsmanager.cpp
index 9524e0c..635d717 100644
--- a/toonz/sources/tnzbase/permissionsmanager.cpp
+++ b/toonz/sources/tnzbase/permissionsmanager.cpp
@@ -161,15 +161,14 @@ void PermissionsManager::Imp::loadPermissions()
 //=========================================================
 
 PermissionsManager::PermissionsManager()
+	: m_imp(new Imp())
 {
-	m_imp = new Imp();
 }
 
 //---------------------------------------------------------
 
 PermissionsManager::~PermissionsManager()
 {
-	delete m_imp;
 }
 
 //---------------------------------------------------------
diff --git a/toonz/sources/tnzext/meshtexturizer.cpp b/toonz/sources/tnzext/meshtexturizer.cpp
index 2489872..16f8557 100644
--- a/toonz/sources/tnzext/meshtexturizer.cpp
+++ b/toonz/sources/tnzext/meshtexturizer.cpp
@@ -212,7 +212,6 @@ MeshTexturizer::MeshTexturizer()
 
 MeshTexturizer::~MeshTexturizer()
 {
-	delete m_imp;
 }
 
 //---------------------------------------------------------------------------------
diff --git a/toonz/sources/tnzext/plasticdeformer.cpp b/toonz/sources/tnzext/plasticdeformer.cpp
index 6ded943..6dfd6c1 100644
--- a/toonz/sources/tnzext/plasticdeformer.cpp
+++ b/toonz/sources/tnzext/plasticdeformer.cpp
@@ -887,7 +887,6 @@ PlasticDeformer::PlasticDeformer()
 
 PlasticDeformer::~PlasticDeformer()
 {
-	delete m_imp;
 }
 
 //---------------------------------------------------------------------------------
diff --git a/toonz/sources/tnzext/plasticdeformerstorage.cpp b/toonz/sources/tnzext/plasticdeformerstorage.cpp
index b0262ed..572b266 100644
--- a/toonz/sources/tnzext/plasticdeformerstorage.cpp
+++ b/toonz/sources/tnzext/plasticdeformerstorage.cpp
@@ -445,7 +445,6 @@ PlasticDeformerStorage::PlasticDeformerStorage()
 
 PlasticDeformerStorage::~PlasticDeformerStorage()
 {
-	delete m_imp;
 }
 
 //----------------------------------------------------------------------------------
diff --git a/toonz/sources/tnzext/plasticskeleton.cpp b/toonz/sources/tnzext/plasticskeleton.cpp
index 97c075b..1130b29 100644
--- a/toonz/sources/tnzext/plasticskeleton.cpp
+++ b/toonz/sources/tnzext/plasticskeleton.cpp
@@ -149,7 +149,6 @@ PlasticSkeleton::PlasticSkeleton()
 
 PlasticSkeleton::~PlasticSkeleton()
 {
-	delete m_imp;
 }
 
 //------------------------------------------------------------------
diff --git a/toonz/sources/tnzext/plasticskeletondeformation.cpp b/toonz/sources/tnzext/plasticskeletondeformation.cpp
index 201d616..4a248a3 100644
--- a/toonz/sources/tnzext/plasticskeletondeformation.cpp
+++ b/toonz/sources/tnzext/plasticskeletondeformation.cpp
@@ -644,8 +644,6 @@ PlasticSkeletonDeformation::~PlasticSkeletonDeformation()
 	SkeletonSet::iterator st, sEnd(m_imp->m_skeletons.end());
 	for (st = m_imp->m_skeletons.begin(); st != sEnd; ++st)
 		st->get_right()->removeListener(this);
-
-	delete m_imp;
 }
 
 //------------------------------------------------------------------
diff --git a/toonz/sources/toonz/moviegenerator.cpp b/toonz/sources/toonz/moviegenerator.cpp
index a73b2a9..d3ae184 100644
--- a/toonz/sources/toonz/moviegenerator.cpp
+++ b/toonz/sources/toonz/moviegenerator.cpp
@@ -458,12 +458,11 @@ MovieGenerator::MovieGenerator(
 	const TDimension &resolution,
 	TOutputProperties &outputProperties,
 	bool useMarkers)
-	: m_imp(0)
 {
 	if (path.getType() == "swf" || path.getType() == "scr")
-		m_imp = new FlashMovieGenerator(path, resolution, outputProperties);
+		m_imp.reset(new FlashMovieGenerator(path, resolution, outputProperties));
 	else
-		m_imp = new RasterMovieGenerator(path, resolution, outputProperties);
+		m_imp.reset(new RasterMovieGenerator(path, resolution, outputProperties));
 	m_imp->m_useMarkers = useMarkers;
 }
 
@@ -471,7 +470,6 @@ MovieGenerator::MovieGenerator(
 
 MovieGenerator::~MovieGenerator()
 {
-	delete m_imp;
 }
 
 //-------------------------------------------------------------------
@@ -508,7 +506,7 @@ bool MovieGenerator::addSoundtrack(const ToonzScene &scene, int frameOffset, int
 bool MovieGenerator::addScene(ToonzScene &scene, int r0, int r1)
 {
 	TApp *app = TApp::instance();
-	RasterMovieGenerator *imp = dynamic_cast<RasterMovieGenerator *>(m_imp);
+	RasterMovieGenerator *imp = dynamic_cast<RasterMovieGenerator *>(m_imp.get());
 	if (imp)
 		imp->m_alphaEnabled = true;
 	m_imp->m_renderRange = std::make_pair(r0, r1);
diff --git a/toonz/sources/toonz/moviegenerator.h b/toonz/sources/toonz/moviegenerator.h
index a0666d2..84717e1 100644
--- a/toonz/sources/toonz/moviegenerator.h
+++ b/toonz/sources/toonz/moviegenerator.h
@@ -1,8 +1,8 @@
-
-
 #ifndef MOVIEGENERATOR_INCLUDED
 #define MOVIEGENERATOR_INCLUDED
 
+#include <memory>
+
 #include "tfilepath.h"
 #include "tpixel.h"
 #include "tgeometry.h"
@@ -26,7 +26,7 @@ public:
 	class Imp;
 
 private:
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 public:
 	class Listener
diff --git a/toonz/sources/toonz/previewer.cpp b/toonz/sources/toonz/previewer.cpp
index 97fbeca..79b3220 100644
--- a/toonz/sources/toonz/previewer.cpp
+++ b/toonz/sources/toonz/previewer.cpp
@@ -1018,7 +1018,6 @@ Previewer::Previewer(bool subcamera)
 
 Previewer::~Previewer()
 {
-	delete m_imp;
 }
 
 //-----------------------------------------------------------------------------
diff --git a/toonz/sources/toonz/previewer.h b/toonz/sources/toonz/previewer.h
index 3324e34..7b20e80 100644
--- a/toonz/sources/toonz/previewer.h
+++ b/toonz/sources/toonz/previewer.h
@@ -1,8 +1,8 @@
-
-
 #ifndef PREVIEWER_INCLUDED
 #define PREVIEWER_INCLUDED
 
+#include <memory>
+
 #include "traster.h"
 #include "tfx.h"
 
@@ -31,7 +31,7 @@ class Previewer : public QObject, public TFxObserver
 	Q_OBJECT
 
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 	Previewer(bool subcamera);
 	~Previewer();
diff --git a/toonz/sources/toonzfarm/include/service.h b/toonz/sources/toonzfarm/include/service.h
index 2edc4dc..5e20d3d 100644
--- a/toonz/sources/toonzfarm/include/service.h
+++ b/toonz/sources/toonzfarm/include/service.h
@@ -1,9 +1,7 @@
-
-
 #ifndef SERVICE_H
 #define SERVICE_H
 
-//#include "tfilepath.h"
+#include <memory>
 
 class TFilePath;
 
@@ -86,7 +84,7 @@ public:
 
 private:
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 
 	static TService *m_instance;
 };
diff --git a/toonz/sources/toonzfarm/include/tlog.h b/toonz/sources/toonzfarm/include/tlog.h
index 2d0e318..a489eea 100644
--- a/toonz/sources/toonzfarm/include/tlog.h
+++ b/toonz/sources/toonzfarm/include/tlog.h
@@ -1,8 +1,8 @@
-
-
 #ifndef TSYSLOG_H
 #define TSYSLOG_H
 
+#include <memory>
+
 #include "tcommon.h"
 #include <QString>
 
@@ -45,7 +45,7 @@ public:
 
 private:
 	class Imp;
-	Imp *m_imp;
+	std::unique_ptr<Imp> m_imp;
 };
 
 #endif
diff --git a/toonz/sources/toonzfarm/tfarm/service.cpp b/toonz/sources/toonzfarm/tfarm/service.cpp
index 84403ac..7fcc4eb 100644
--- a/toonz/sources/toonzfarm/tfarm/service.cpp
+++ b/toonz/sources/toonzfarm/tfarm/service.cpp
@@ -123,7 +123,6 @@ TService::TService(const string &name, const string &displayName)
 
 TService::~TService()
 {
-	delete m_imp;
 }
 
 //------------------------------------------------------------------------------
diff --git a/toonz/sources/toonzfarm/tfarm/tfarmserverstub.cpp b/toonz/sources/toonzfarm/tfarm/tfarmserverstub.cpp
index b597002..527f83a 100644
--- a/toonz/sources/toonzfarm/tfarm/tfarmserverstub.cpp
+++ b/toonz/sources/toonzfarm/tfarm/tfarmserverstub.cpp
@@ -106,7 +106,6 @@ TFarmServerStub::TFarmServerStub(TFarmServer *farmServer, int port)
 
 TFarmServerStub::~TFarmServerStub()
 {
-	delete m_imp;
 }
 
 //------------------------------------------------------------------------------
diff --git a/toonz/sources/toonzfarm/tfarm/tfarmtask.cpp b/toonz/sources/toonzfarm/tfarm/tfarmtask.cpp
index bf79bb8..f91e492 100644
--- a/toonz/sources/toonzfarm/tfarm/tfarmtask.cpp
+++ b/toonz/sources/toonzfarm/tfarm/tfarmtask.cpp
@@ -697,7 +697,6 @@ TFarmTaskGroup::TFarmTaskGroup(const TFarmTaskGroup &src)
 
 TFarmTaskGroup::~TFarmTaskGroup()
 {
-	delete m_imp;
 }
 
 //------------------------------------------------------------------------------
diff --git a/toonz/sources/toonzfarm/tfarm/tlog.cpp b/toonz/sources/toonzfarm/tfarm/tlog.cpp
index 23309bd..1c7457c 100644
--- a/toonz/sources/toonzfarm/tfarm/tlog.cpp
+++ b/toonz/sources/toonzfarm/tfarm/tlog.cpp
@@ -201,7 +201,6 @@ TUserLog::TUserLog(const TFilePath &fp) : m_imp(new Imp(fp))
 
 TUserLog::~TUserLog()
 {
-	delete m_imp;
 }
 
 //------------------------------------------------------------------------------
diff --git a/toonz/sources/toonzfarm/tfarm/ttcpipserver.cpp b/toonz/sources/toonzfarm/tfarm/ttcpipserver.cpp
index b7f7cb7..8b200ce 100644
--- a/toonz/sources/toonzfarm/tfarm/ttcpipserver.cpp
+++ b/toonz/sources/toonzfarm/tfarm/ttcpipserver.cpp
@@ -268,7 +268,6 @@ TTcpIpServer::~TTcpIpServer()
 		std::cout << "closing socket" << std::endl;
 	close(m_imp->m_s);
 #endif
-	delete m_imp;
 }
 
 //---------------------------------------------------------------------
@@ -290,14 +289,13 @@ static void shutdown_cb(int)
 class DataReader : public TThread::Runnable
 {
 public:
-	DataReader(int clientSocket, TTcpIpServer *server, TTcpIpServerImp *serverImp)
-		: m_clientSocket(clientSocket), m_server(server), m_serverImp(serverImp) {}
+	DataReader(int clientSocket, std::shared_ptr<TTcpIpServerImp> serverImp)
+		: m_clientSocket(clientSocket), m_serverImp(std::move(serverImp)) {}
 
 	void run();
 
 	int m_clientSocket;
-	TTcpIpServer *m_server;
-	TTcpIpServerImp *m_serverImp;
+	std::shared_ptr<TTcpIpServerImp> m_serverImp;
 };
 
 void DataReader::run()
@@ -322,15 +320,14 @@ void DataReader::run()
 class DataReceiver : public TThread::Runnable
 {
 public:
-	DataReceiver(int clientSocket, const QString &data, TTcpIpServer *server, TTcpIpServerImp *serverImp)
-		: m_clientSocket(clientSocket), m_data(data), m_server(server), m_serverImp(serverImp) {}
+	DataReceiver(int clientSocket, const QString &data, std::shared_ptr<TTcpIpServerImp> serverImp)
+		: m_clientSocket(clientSocket), m_data(data), m_serverImp(std::move(serverImp)) {}
 
 	void run();
 
 	int m_clientSocket;
 	QString m_data;
-	TTcpIpServer *m_server;
-	TTcpIpServerImp *m_serverImp;
+	std::shared_ptr<TTcpIpServerImp> m_serverImp;
 };
 
 //---------------------------------------------------------------------
@@ -374,7 +371,7 @@ void TTcpIpServer::run()
 					} else {
 						// creo un nuovo thread per la gestione dei dati ricevuti
 						TThread::Executor executor;
-						executor.addTask(new DataReceiver(t, data, this, m_imp));
+						executor.addTask(new DataReceiver(t, data, m_imp));
 					}
 				} else {
 					::shutdown(t, 1);
@@ -413,7 +410,7 @@ void TTcpIpServer::run()
 				}
 
 				TThread::Executor executor;
-				executor.addTask(new DataReader(t, this, m_imp));
+				executor.addTask(new DataReader(t, m_imp));
 			}
 		} else {
 			m_exitCode = err;
diff --git a/toonz/sources/toonzlib/autoclose.cpp b/toonz/sources/toonzlib/autoclose.cpp
index 1443b63..a5289fb 100644
--- a/toonz/sources/toonzlib/autoclose.cpp
+++ b/toonz/sources/toonzlib/autoclose.cpp
@@ -1144,8 +1144,8 @@ return 0;
 /*=============================================================================*/
 
 TAutocloser::TAutocloser(const TRasterP &r, int distance, double angle, int index, int opacity)
+	: m_imp(new Imp(r, distance, angle, index, opacity))
 {
-	m_imp = new Imp(r, distance, angle, index, opacity);
 }
 
 //...............................
@@ -1161,7 +1161,6 @@ void TAutocloser::exec()
 
 TAutocloser::~TAutocloser()
 {
-	delete m_imp;
 }
 
 //-------------------------------------------------
diff --git a/toonz/sources/toonzlib/imagemanager.cpp b/toonz/sources/toonzlib/imagemanager.cpp
index 8c31abb..a5bdbc4 100644
--- a/toonz/sources/toonzlib/imagemanager.cpp
+++ b/toonz/sources/toonzlib/imagemanager.cpp
@@ -181,7 +181,6 @@ ImageManager::ImageManager()
 
 ImageManager::~ImageManager()
 {
-	delete m_imp;
 }
 
 //-----------------------------------------------------------------------------
diff --git a/toonz/sources/toonzlib/scriptbinding_renderer.cpp b/toonz/sources/toonzlib/scriptbinding_renderer.cpp
index d361a58..056d231 100644
--- a/toonz/sources/toonzlib/scriptbinding_renderer.cpp
+++ b/toonz/sources/toonzlib/scriptbinding_renderer.cpp
@@ -212,8 +212,6 @@ Renderer::Renderer()
 
 Renderer::~Renderer()
 {
-	delete m_imp;
-	m_imp = 0;
 }
 
 QScriptValue Renderer::ctor(QScriptContext *context, QScriptEngine *engine)
diff --git a/toonz/sources/toonzlib/tlog.cpp b/toonz/sources/toonzlib/tlog.cpp
index 1856536..4756631 100644
--- a/toonz/sources/toonzlib/tlog.cpp
+++ b/toonz/sources/toonzlib/tlog.cpp
@@ -210,7 +210,6 @@ TUserLogAppend::TUserLogAppend(const TFilePath &fp) : m_imp(new Imp(fp))
 
 TUserLogAppend::~TUserLogAppend()
 {
-	//delete m_imp;
 }
 
 //------------------------------------------------------------------------------
diff --git a/toonz/sources/toonzlib/tstageobjecttree.cpp b/toonz/sources/toonzlib/tstageobjecttree.cpp
index dc74a87..a67bb20 100644
--- a/toonz/sources/toonzlib/tstageobjecttree.cpp
+++ b/toonz/sources/toonzlib/tstageobjecttree.cpp
@@ -103,8 +103,6 @@ TStageObjectTree::TStageObjectTree() : m_imp(new TStageObjectTreeImp)
 
 TStageObjectTree::~TStageObjectTree()
 {
-	delete m_imp;
-	m_imp = 0;
 }
 
 //-----------------------------------------------------------------------------
diff --git a/toonz/sources/toonzlib/txsheet.cpp b/toonz/sources/toonzlib/txsheet.cpp
index 966f795..afb8692 100644
--- a/toonz/sources/toonzlib/txsheet.cpp
+++ b/toonz/sources/toonzlib/txsheet.cpp
@@ -165,7 +165,10 @@ TXsheet::TXsheetImp::~TXsheetImp()
 // TXsheet
 
 TXsheet::TXsheet()
-	: TSmartObject(m_classCode), m_player(0), m_imp(new TXsheet::TXsheetImp), m_notes(new TXshNoteSet())
+	: TSmartObject(m_classCode)
+	, m_player(0)
+	, m_imp(new TXsheet::TXsheetImp)
+	, m_notes(new TXshNoteSet())
 {
 	//extern TSyntax::Grammar *createXsheetGrammar(TXsheet*);
 	m_soundProperties = new TXsheet::SoundProperties();
@@ -181,7 +184,6 @@ TXsheet::~TXsheet()
 	texture_utils::invalidateTextures(this);
 
 	assert(m_imp);
-	delete m_imp;
 	if (m_notes)
 		delete m_notes;
 	if (m_soundProperties)
diff --git a/toonz/sources/toonzqt/infoviewer.cpp b/toonz/sources/toonzqt/infoviewer.cpp
index 62a4534..6eaf529 100644
--- a/toonz/sources/toonzqt/infoviewer.cpp
+++ b/toonz/sources/toonzqt/infoviewer.cpp
@@ -116,13 +116,13 @@ public slots:
 
 InfoViewer::InfoViewer(QWidget *parent)
 	: Dialog()
+	, m_imp(new InfoViewerImp())
 {
 	setWindowTitle(tr("File Info"));
 	setWindowFlags(windowFlags() | Qt::WindowStaysOnTopHint);
 	//setAttribute(Qt::WA_DeleteOnClose);
 
 	m_parent = parent;
-	m_imp = new InfoViewerImp();
 
 	int i;
 	for (i = 0; i < (int)m_imp->m_labels.size(); i++) {
@@ -143,7 +143,6 @@ InfoViewer::InfoViewer(QWidget *parent)
 
 InfoViewer::~InfoViewer()
 {
-	delete m_imp;
 }
 
 //----------------------------------------------------------------