diff --git a/src/floatnumberwidget.cpp b/src/floatnumberwidget.cpp
index af6f2919..2ff3365f 100644
--- a/src/floatnumberwidget.cpp
+++ b/src/floatnumberwidget.cpp
@@ -6,15 +6,14 @@ FloatNumberWidget::FloatNumberWidget(QWidget *parent) :
 {
     m_slider = new QSlider(Qt::Horizontal, this);
     m_slider->setRange(0, 100);
+    m_slider->setFixedWidth(120);
 
     m_label = new QLabel(this);
-    m_label->setAlignment(Qt::AlignCenter);
-    m_label->setNum(0);
-    m_label->setFixedWidth(30);
+    m_label->setAlignment(Qt::AlignLeft);
 
     connect(m_slider, &QAbstractSlider::valueChanged, [=](int value) {
         float fvalue = value / 100.0;
-        m_label->setText(QString().sprintf("%.2f", fvalue));
+        updateValueLabel(fvalue);
         emit valueChanged(fvalue);
     });
 
@@ -24,6 +23,21 @@ FloatNumberWidget::FloatNumberWidget(QWidget *parent) :
     popupLayout->addWidget(m_label);
 }
 
+void FloatNumberWidget::updateValueLabel(float value)
+{
+    QString valueString = QString().sprintf("%.2f", value);
+    if (m_itemName.isEmpty())
+        m_label->setText(valueString);
+    else
+        m_label->setText(m_itemName + ": " + valueString);
+}
+
+void FloatNumberWidget::setItemName(const QString &name)
+{
+    m_itemName = name;
+    updateValueLabel(value());
+}
+
 void FloatNumberWidget::setRange(float min, float max)
 {
     m_slider->setRange(min * 100, max * 100);
diff --git a/src/floatnumberwidget.h b/src/floatnumberwidget.h
index 4df1d5a2..48df208d 100644
--- a/src/floatnumberwidget.h
+++ b/src/floatnumberwidget.h
@@ -12,6 +12,7 @@ public:
     explicit FloatNumberWidget(QWidget *parent = nullptr);
     void setRange(float min, float max);
     float value() const;
+    void setItemName(const QString &name);
 
 public slots:
     void increaseValue();
@@ -20,10 +21,14 @@ public slots:
 
 signals:
     void valueChanged(float value);
+    
+private:
+    void updateValueLabel(float value);
 
 private:
     QLabel *m_label = nullptr;
     QSlider *m_slider = nullptr;
+    QString m_itemName;
 };
 
 #endif
diff --git a/src/main.cpp b/src/main.cpp
index 6812a14c..ffe1216a 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -28,7 +28,7 @@ int main(int argc, char ** argv)
     darkPalette.setColor(QPalette::ButtonText, Theme::white);
     darkPalette.setColor(QPalette::BrightText, Theme::red);
     darkPalette.setColor(QPalette::Link, QColor(42, 130, 218));
-    darkPalette.setColor(QPalette::Highlight, Theme::white);
+    darkPalette.setColor(QPalette::Highlight, Theme::red);
     darkPalette.setColor(QPalette::HighlightedText, Theme::black);
     qApp->setPalette(darkPalette);
     qApp->setStyleSheet("QToolTip { color: #ffffff; background-color: #fc6621; border: 1px solid white; }");
diff --git a/src/meshgenerator.cpp b/src/meshgenerator.cpp
index 6d2e5476..d5dd7a4d 100644
--- a/src/meshgenerator.cpp
+++ b/src/meshgenerator.cpp
@@ -215,12 +215,12 @@ void *MeshGenerator::combinePartMesh(QString partId)
     if (MeshGenerator::m_enableDebug)
         meshlite_bmesh_enable_debug(m_meshliteContext, bmeshId, 1);
     
-    QString mirroredPartId;
-    QUuid mirroredPartIdNotAsString;
-    if (xMirrored) {
-        mirroredPartIdNotAsString = QUuid().createUuid();
-        mirroredPartId = mirroredPartIdNotAsString.toString();
-    }
+    //QString mirroredPartId;
+    //QUuid mirroredPartIdNotAsString;
+    //if (xMirrored) {
+    //    mirroredPartIdNotAsString = QUuid().createUuid();
+    //    mirroredPartId = mirroredPartIdNotAsString.toString();
+    //}
     
     std::map<QString, int> nodeToBmeshIdMap;
     std::map<int, QUuid> bmeshToNodeIdMap;
@@ -252,12 +252,11 @@ void *MeshGenerator::combinePartMesh(QString partId)
         bmeshNode.nodeId = QUuid(nodeId);
         bmeshNode.color = partColor;
         cacheBmeshNodes.push_back(bmeshNode);
-        
-        if (xMirrored) {
-            bmeshNode.partId = mirroredPartId;
-            bmeshNode.origin.setX(-x);
-            cacheBmeshNodes.push_back(bmeshNode);
-        }
+        //if (xMirrored) {
+        //    bmeshNode.partId = mirroredPartId;
+        //    bmeshNode.origin.setX(-x);
+        //    cacheBmeshNodes.push_back(bmeshNode);
+        //}
     }
     
     for (const auto &edgeId: m_partEdgeIds[partId]) {
@@ -300,7 +299,7 @@ void *MeshGenerator::combinePartMesh(QString partId)
     if (nullptr != resultMesh) {
         if (xMirrored) {
             int xMirroredMeshId = meshlite_mirror_in_x(m_meshliteContext, meshId, 0);
-            loadVertexSources(m_meshliteContext, xMirroredMeshId, mirroredPartIdNotAsString, bmeshToNodeIdMap, cacheBmeshVertices);
+            loadVertexSources(m_meshliteContext, xMirroredMeshId, partIdNotAsString, bmeshToNodeIdMap, cacheBmeshVertices);
             void *mirroredMesh = nullptr;
             if (wrapped)
                 mirroredMesh = convertToCombinableConvexHullMesh(m_meshliteContext, xMirroredMeshId);
@@ -411,41 +410,122 @@ void *MeshGenerator::combineComponentMesh(QString componentId, bool *inverse)
         }
     }
     
-    QString linkDataType = valueOfKeyInMapOrEmpty(*component, "linkDataType");
-    if ("partId" == linkDataType) {
-        QString partId = valueOfKeyInMapOrEmpty(*component, "linkData");
-        return combinePartMesh(partId);
+    bool smoothSeam = false;
+    float smoothSeamFactor = 0.0;
+    QString smoothSeamString = valueOfKeyInMapOrEmpty(*component, "smoothSeam");
+    if (!smoothSeamString.isEmpty()) {
+        smoothSeam = true;
+        smoothSeamFactor = smoothSeamString.toFloat();
+    }
+    
+    bool smoothAll = false;
+    float smoothAllFactor = 0.0;
+    QString smoothAllString = valueOfKeyInMapOrEmpty(*component, "smoothAll");
+    if (!smoothAllString.isEmpty()) {
+        smoothAll = true;
+        smoothAllFactor = smoothAllString.toFloat();
     }
     
     void *resultMesh = nullptr;
     
-    for (const auto &childId: valueOfKeyInMapOrEmpty(*component, "children").split(",")) {
-        if (childId.isEmpty())
-            continue;
-        bool childInverse = false;
-        void *childCombinedMesh = combineComponentMesh(childId, &childInverse);
-        if (nullptr == childCombinedMesh)
-            continue;
-        if (nullptr == resultMesh) {
-            if (childInverse) {
-                deleteCombinableMesh(childCombinedMesh);
-            } else {
-                resultMesh = childCombinedMesh;
+    PositionMap<bool> positionsBeforeCombination;
+    auto &verticesSources = m_cacheContext->componentVerticesSources[componentId];
+    verticesSources.map().clear();
+    QString linkDataType = valueOfKeyInMapOrEmpty(*component, "linkDataType");
+    if ("partId" == linkDataType) {
+        QString partId = valueOfKeyInMapOrEmpty(*component, "linkData");
+        resultMesh = combinePartMesh(partId);
+        for (const auto &bmeshVertex: m_cacheContext->partBmeshVertices[partId]) {
+            verticesSources.addPosition(bmeshVertex.position.x(), bmeshVertex.position.y(), bmeshVertex.position.z(),
+                bmeshVertex);
+        }
+    } else {
+        for (const auto &childId: valueOfKeyInMapOrEmpty(*component, "children").split(",")) {
+            if (childId.isEmpty())
+                continue;
+            bool childInverse = false;
+            void *childCombinedMesh = combineComponentMesh(childId, &childInverse);
+            if (smoothSeam) {
+                for (const auto &positionIt: m_cacheContext->componentPositions[childId]) {
+                    positionsBeforeCombination.addPosition(positionIt.x(), positionIt.y(), positionIt.z(), true);
+                }
             }
-        } else {
-            void *newResultMesh = childInverse ? diffCombinableMeshs(resultMesh, childCombinedMesh) : unionCombinableMeshs(resultMesh, childCombinedMesh);
-            deleteCombinableMesh(childCombinedMesh);
-            if (nullptr != newResultMesh) {
-                deleteCombinableMesh(resultMesh);
-                resultMesh = newResultMesh;
+            for (const auto &verticesSourceIt: m_cacheContext->componentVerticesSources[childId].map()) {
+                verticesSources.map()[verticesSourceIt.first] = verticesSourceIt.second;
+            }
+            if (nullptr == childCombinedMesh)
+                continue;
+            if (nullptr == resultMesh) {
+                if (childInverse) {
+                    deleteCombinableMesh(childCombinedMesh);
+                } else {
+                    resultMesh = childCombinedMesh;
+                }
+            } else {
+                void *newResultMesh = childInverse ? diffCombinableMeshs(resultMesh, childCombinedMesh) : unionCombinableMeshs(resultMesh, childCombinedMesh);
+                deleteCombinableMesh(childCombinedMesh);
+                if (nullptr != newResultMesh) {
+                    deleteCombinableMesh(resultMesh);
+                    resultMesh = newResultMesh;
+                }
             }
         }
     }
     
-    if (!componentIdNotAsString.isNull()) {
-        m_cacheContext->updateComponentCombinableMesh(componentId, resultMesh);
+    if (nullptr != resultMesh) {
+        if (smoothSeam || smoothAll) {
+            int meshIdForSmooth = convertFromCombinableMesh(m_meshliteContext, resultMesh);
+            std::vector<QVector3D> positionsBeforeSmooth;
+            loadMeshVerticesPositions(m_meshliteContext, meshIdForSmooth, positionsBeforeSmooth);
+            
+            if (!positionsBeforeSmooth.empty()) {
+
+                if (smoothSeam) {
+                    int *seamVerticesIndicies = new int[positionsBeforeSmooth.size()];
+                    int seamVerticesNum = 0;
+                    for (size_t vertexIndex = 0; vertexIndex < positionsBeforeSmooth.size(); vertexIndex++) {
+                        const auto &oldPosition = positionsBeforeSmooth[vertexIndex];
+                        if (!positionsBeforeCombination.findPosition(oldPosition.x(), oldPosition.y(), oldPosition.z())) {
+                            seamVerticesIndicies[seamVerticesNum++] = vertexIndex + 1;
+                        }
+                    }
+                    if (seamVerticesNum > 0) {
+                        qDebug() << "smoothSeamFactor:" << smoothSeamFactor << "seamVerticesIndicies.size():" << seamVerticesNum;
+                        meshlite_smooth_vertices(m_meshliteContext, meshIdForSmooth, smoothSeamFactor, seamVerticesIndicies, seamVerticesNum);
+                    }
+                    delete[] seamVerticesIndicies;
+                }
+                
+                if (smoothAll) {
+                    meshlite_smooth(m_meshliteContext, meshIdForSmooth, smoothAllFactor);
+                }
+                
+                std::vector<QVector3D> positionsAfterSmooth;
+                loadMeshVerticesPositions(m_meshliteContext, meshIdForSmooth, positionsAfterSmooth);
+                assert(positionsBeforeSmooth.size() == positionsAfterSmooth.size());
+                
+                for (size_t vertexIndex = 0; vertexIndex < positionsBeforeSmooth.size(); vertexIndex++) {
+                    const auto &oldPosition = positionsBeforeSmooth[vertexIndex];
+                    const auto &smoothedPosition = positionsAfterSmooth[vertexIndex];
+                    BmeshVertex source;
+                    if (verticesSources.findPosition(oldPosition.x(), oldPosition.y(), oldPosition.z(), &source)) {
+                        verticesSources.removePosition(oldPosition.x(), oldPosition.y(), oldPosition.z());
+                        source.position = smoothedPosition;
+                        verticesSources.addPosition(smoothedPosition.x(), smoothedPosition.y(), smoothedPosition.z(), source);
+                    }
+                }
+                
+                deleteCombinableMesh(resultMesh);
+                resultMesh = convertToCombinableMesh(m_meshliteContext, meshIdForSmooth);
+            }
+        }
     }
     
+    m_cacheContext->updateComponentCombinableMesh(componentId, resultMesh);
+    auto &cachedComponentPositions = m_cacheContext->componentPositions[componentId];
+    cachedComponentPositions.clear();
+    loadCombinableMeshVerticesPositions(resultMesh, cachedComponentPositions);
+    
     return resultMesh;
 }
 
@@ -488,11 +568,27 @@ void MeshGenerator::process()
             }
             it++;
         }
+        for (auto it = m_cacheContext->componentPositions.begin(); it != m_cacheContext->componentPositions.end(); ) {
+            if (m_snapshot->components.find(it->first) == m_snapshot->components.end()) {
+                it = m_cacheContext->componentPositions.erase(it);
+                continue;
+            }
+            it++;
+        }
+        for (auto it = m_cacheContext->componentVerticesSources.begin(); it != m_cacheContext->componentVerticesSources.end(); ) {
+            if (m_snapshot->components.find(it->first) == m_snapshot->components.end()) {
+                it = m_cacheContext->componentVerticesSources.erase(it);
+                continue;
+            }
+            it++;
+        }
     }
     
     collectParts();
     checkDirtyFlags();
     
+    m_dirtyComponentIds.insert(QUuid().toString());
+    
     m_mainProfileMiddleX = valueOfKeyInMapOrEmpty(m_snapshot->canvas, "originX").toFloat();
     m_mainProfileMiddleY = valueOfKeyInMapOrEmpty(m_snapshot->canvas, "originY").toFloat();
     m_sideProfileMiddleX = valueOfKeyInMapOrEmpty(m_snapshot->canvas, "originZ").toFloat();
@@ -506,9 +602,8 @@ void MeshGenerator::process()
         deleteCombinableMesh(combinedMesh);
     }
     
-    for (const auto &bmeshVertices: m_cacheContext->partBmeshVertices) {
-        m_meshResultContext->bmeshVertices.insert(m_meshResultContext->bmeshVertices.end(),
-            bmeshVertices.second.begin(), bmeshVertices.second.end());
+    for (const auto &verticesSourcesIt: m_cacheContext->componentVerticesSources[QUuid().toString()].map()) {
+        m_meshResultContext->bmeshVertices.push_back(verticesSourcesIt.second);
     }
     
     for (const auto &bmeshNodes: m_cacheContext->partBmeshNodes) {
diff --git a/src/meshgenerator.h b/src/meshgenerator.h
index abe52b81..5f2fced3 100644
--- a/src/meshgenerator.h
+++ b/src/meshgenerator.h
@@ -11,6 +11,7 @@
 #include "meshloader.h"
 #include "modelofflinerender.h"
 #include "meshresultcontext.h"
+#include "positionmap.h"
 
 class GeneratedCacheContext
 {
@@ -19,6 +20,8 @@ public:
     std::map<QString, std::vector<BmeshVertex>> partBmeshVertices;
     std::map<QString, std::vector<BmeshNode>> partBmeshNodes;
     std::map<QString, void *> componentCombinableMeshs;
+    std::map<QString, std::vector<QVector3D>> componentPositions;
+    std::map<QString, PositionMap<BmeshVertex>> componentVerticesSources;
     void updateComponentCombinableMesh(QString componentId, void *mesh);
 };
 
@@ -29,7 +32,6 @@ public:
     MeshGenerator(SkeletonSnapshot *snapshot, QThread *thread);
     ~MeshGenerator();
     void setSharedContextWidget(QOpenGLWidget *widget);
-    //void addPreviewRequirement();
     void addPartPreviewRequirement(const QString &partId);
     void setGeneratedCacheContext(GeneratedCacheContext *cacheContext);
     MeshLoader *takeResultMesh();
@@ -59,6 +61,7 @@ private:
     std::map<QString, std::set<QString>> m_partEdgeIds;
     std::set<QString> m_dirtyComponentIds;
     std::set<QString> m_dirtyPartIds;
+    PositionMap<std::pair<QString, int>> m_bmeshPartVerticesIndiciesMap;
 private:
     static bool m_enableDebug;
 private:
diff --git a/src/meshutil.cpp b/src/meshutil.cpp
index 0237b60b..b04d85d0 100644
--- a/src/meshutil.cpp
+++ b/src/meshutil.cpp
@@ -31,16 +31,13 @@ typedef CGAL::Surface_mesh<ExactKernel::Point_3> ExactMesh;
 typedef CGAL::Surface_mesh<SimpleKernel::Point_3> SimpleMesh;
 namespace PMP = CGAL::Polygon_mesh_processing;
 
-template <class Kernel>
-typename CGAL::Surface_mesh<typename Kernel::Point_3> *makeCgalMeshFromMeshlite(void *meshlite, int meshId)
+void loadMeshVerticesPositions(void *meshliteContext, int meshId, std::vector<QVector3D> &positions)
 {
-    typename CGAL::Surface_mesh<typename Kernel::Point_3> *mesh = new typename CGAL::Surface_mesh<typename Kernel::Point_3>;
-    int vertexCount = meshlite_get_vertex_count(meshlite, meshId);
+    int vertexCount = meshlite_get_vertex_count(meshliteContext, meshId);
     float *vertexPositions = new float[vertexCount * 3];
-    int vertexArrayLen = meshlite_get_vertex_position_array(meshlite, meshId, vertexPositions, vertexCount * 3);
+    int vertexArrayLen = meshlite_get_vertex_position_array(meshliteContext, meshId, vertexPositions, vertexCount * 3);
     int offset = 0;
     assert(vertexArrayLen == vertexCount * 3);
-    std::vector<typename CGAL::Surface_mesh<typename Kernel::Point_3>::Vertex_index> vertices;
     for (int i = 0; i < vertexCount; i++) {
         float x = vertexPositions[offset + 0];
         float y = vertexPositions[offset + 1];
@@ -51,7 +48,34 @@ typename CGAL::Surface_mesh<typename Kernel::Point_3> *makeCgalMeshFromMeshlite(
             y = 0;
         if (std::isnan(z) || std::isinf(z))
             z = 0;
-        vertices.push_back(mesh->add_vertex(typename Kernel::Point_3(x, y, z)));
+        positions.push_back(QVector3D(x, y, z));
+        offset += 3;
+    }
+    delete[] vertexPositions;
+}
+
+template <class Kernel>
+typename CGAL::Surface_mesh<typename Kernel::Point_3> *makeCgalMeshFromMeshlite(void *meshlite, int meshId)
+{
+    typename CGAL::Surface_mesh<typename Kernel::Point_3> *mesh = new typename CGAL::Surface_mesh<typename Kernel::Point_3>;
+    int vertexCount = meshlite_get_vertex_count(meshlite, meshId);
+    float *vertexPositions = new float[vertexCount * 3];
+    int vertexArrayLen = meshlite_get_vertex_position_array(meshlite, meshId, vertexPositions, vertexCount * 3);
+    int offset = 0;
+    assert(vertexArrayLen == vertexCount * 3);
+    std::vector<QVector3D> oldPositions;
+    std::map<int, typename CGAL::Surface_mesh<typename Kernel::Point_3>::Vertex_index> oldToNewMap;
+    for (int i = 0; i < vertexCount; i++) {
+        float x = vertexPositions[offset + 0];
+        float y = vertexPositions[offset + 1];
+        float z = vertexPositions[offset + 2];
+        if (std::isnan(x) || std::isinf(x))
+            x = 0;
+        if (std::isnan(y) || std::isinf(y))
+            y = 0;
+        if (std::isnan(z) || std::isinf(z))
+            z = 0;
+        oldPositions.push_back(QVector3D(x, y, z));
         offset += 3;
     }
     int faceCount = meshlite_get_face_count(meshlite, meshId);
@@ -62,26 +86,51 @@ typename CGAL::Surface_mesh<typename Kernel::Point_3> *makeCgalMeshFromMeshlite(
     while (i < filledLength) {
         int num = faceVertexNumAndIndices[i++];
         assert(num > 0 && num <= MAX_VERTICES_PER_FACE);
+        if (num < 3)
+            continue;
         std::vector<typename CGAL::Surface_mesh<typename Kernel::Point_3>::Vertex_index> faceVertexIndices;
         for (int j = 0; j < num; j++) {
             int index = faceVertexNumAndIndices[i++];
             assert(index >= 0 && index < vertexCount);
-            faceVertexIndices.push_back(vertices[index]);
-        }
-        if (faceVertexIndices.size() >= 3) {
-            mesh->add_face(faceVertexIndices);
-            addedFaceCount++;
+            if (oldToNewMap.find(index) == oldToNewMap.end()) {
+                const auto &pos = oldPositions[index];
+                oldToNewMap[index] = mesh->add_vertex(typename Kernel::Point_3(pos.x(), pos.y(), pos.z()));
+            }
+            faceVertexIndices.push_back(oldToNewMap[index]);
         }
+        mesh->add_face(faceVertexIndices);
+        addedFaceCount++;
     }
     delete[] faceVertexNumAndIndices;
     delete[] vertexPositions;
-    if (0 == addedFaceCount) {
+    if (addedFaceCount < 3) {
         delete mesh;
         mesh = nullptr;
     }
     return mesh;
 }
 
+void loadCombinableMeshVerticesPositions(void *mesh, std::vector<QVector3D> &positions)
+{
+    ExactMesh *exactMesh = (ExactMesh *)mesh;
+    if (nullptr == exactMesh)
+        return;
+    
+    for (auto vertexIt = exactMesh->vertices_begin(); vertexIt != exactMesh->vertices_end(); vertexIt++) {
+        auto point = exactMesh->point(*vertexIt);
+        float x = (float)CGAL::to_double(point.x());
+        float y = (float)CGAL::to_double(point.y());
+        float z = (float)CGAL::to_double(point.z());
+        if (std::isnan(x) || std::isinf(x))
+            x = 0;
+        if (std::isnan(y) || std::isinf(y))
+            y = 0;
+        if (std::isnan(z) || std::isinf(z))
+            z = 0;
+        positions.push_back(QVector3D(x, y, z));
+    }
+}
+
 // https://doc.cgal.org/latest/Surface_mesh/index.html#circulators_example
 // https://www.cgal.org/FAQ.html
 template <class Kernel>
@@ -256,7 +305,6 @@ ExactMesh *diffCgalMeshs(ExactMesh *first, ExactMesh *second)
 int unionMeshs(void *meshliteContext, const std::vector<int> &meshIds, const std::set<int> &inverseIds, int *errorCount)
 {
 #if USE_CGAL == 1
-    CGAL::set_error_behaviour(CGAL::CONTINUE);
     std::vector<ExactMesh *> externalMeshs;
     for (size_t i = 0; i < meshIds.size(); i++) {
         int triangledMeshId = meshlite_triangulate(meshliteContext, meshIds[i]);
@@ -331,7 +379,6 @@ int subdivMesh(void *meshliteContext, int meshId, int *errorCount)
     int triangulatedMeshId = meshlite_triangulate(meshliteContext, meshId);
     if (0 == meshlite_is_triangulated_manifold(meshliteContext, triangulatedMeshId)) {
 #if USE_CGAL == 1
-        CGAL::set_error_behaviour(CGAL::THROW_EXCEPTION);
         int subdiviedMeshId = 0;
         SimpleMesh *simpleMesh = nullptr;
         try {
@@ -359,7 +406,7 @@ int fixMeshHoles(void *meshliteContext, int meshId)
 
 void initMeshUtils()
 {
-    CGAL::set_error_behaviour(CGAL::CONTINUE);
+    CGAL::set_error_behaviour(CGAL::THROW_EXCEPTION);
 }
 
 void *convertToCombinableMesh(void *meshliteContext, int meshId)
diff --git a/src/meshutil.h b/src/meshutil.h
index afdafde6..a767efe3 100644
--- a/src/meshutil.h
+++ b/src/meshutil.h
@@ -2,6 +2,7 @@
 #define MESH_UTIL_H
 #include <vector>
 #include <set>
+#include <QVector3D>
 
 int mergeMeshs(void *meshliteContext, const std::vector<int> &meshIds);
 int unionMeshs(void *meshliteContext, const std::vector<int> &meshIds, const std::set<int> &inverseIds, int *errorCount=0);
@@ -16,5 +17,7 @@ int convertFromCombinableMesh(void *meshliteContext, void *mesh);
 void deleteCombinableMesh(void *mesh);
 void *cloneCombinableMesh(void *mesh);
 void *convertToCombinableConvexHullMesh(void *meshliteContext, int meshId);
+void loadMeshVerticesPositions(void *meshliteContext, int meshId, std::vector<QVector3D> &positions);
+void loadCombinableMeshVerticesPositions(void *mesh, std::vector<QVector3D> &positions);
 
 #endif
diff --git a/src/positionmap.h b/src/positionmap.h
index c74d8691..beb30a3a 100644
--- a/src/positionmap.h
+++ b/src/positionmap.h
@@ -50,7 +50,7 @@ public:
         m_map[makeKey(x, y, z)] = data;
     }
 
-    bool findPosition(float x, float y, float z, T *data)
+    bool findPosition(float x, float y, float z, T *data = nullptr)
     {
         const auto &result = m_map.find(makeKey(x, y, z));
         if (result == m_map.end())
@@ -59,6 +59,16 @@ public:
             *data = result->second;
         return true;
     }
+    
+    void removePosition(float x, float y, float z)
+    {
+        m_map.erase(makeKey(x, y, z));
+    }
+    
+    std::map<PositionMapKey, T> &map()
+    {
+        return m_map;
+    }
 
 private:
     std::map<PositionMapKey, T> m_map;
diff --git a/src/skeletondocument.cpp b/src/skeletondocument.cpp
index 9b2612c3..241121ec 100644
--- a/src/skeletondocument.cpp
+++ b/src/skeletondocument.cpp
@@ -725,6 +725,10 @@ void SkeletonDocument::toSnapshot(SkeletonSnapshot *snapshot, const std::set<QUu
         component["expanded"] = componentIt.second.expanded ? "true" : "false";
         component["inverse"] = componentIt.second.inverse ? "true" : "false";
         component["dirty"] = componentIt.second.dirty ? "true" : "false";
+        if (componentIt.second.smoothAllAdjusted())
+            component["smoothAll"] = QString::number(componentIt.second.smoothAll);
+        if (componentIt.second.smoothSeamAdjusted())
+            component["smoothSeam"] = QString::number(componentIt.second.smoothSeam);
         QStringList childIdList;
         for (const auto &childId: componentIt.second.childrenIds) {
             childIdList.append(childId.toString());
@@ -862,6 +866,12 @@ void SkeletonDocument::addFromSnapshot(const SkeletonSnapshot &snapshot)
         component.name = valueOfKeyInMapOrEmpty(componentKv.second, "name");
         component.expanded = isTrueValueString(valueOfKeyInMapOrEmpty(componentKv.second, "expanded"));
         component.inverse = isTrueValueString(valueOfKeyInMapOrEmpty(componentKv.second, "inverse"));
+        const auto &smoothAllIt = componentKv.second.find("smoothAll");
+        if (smoothAllIt != componentKv.second.end())
+            component.setSmoothAll(smoothAllIt->second.toFloat());
+        const auto &smoothSeamIt = componentKv.second.find("smoothSeam");
+        if (smoothSeamIt != componentKv.second.end())
+            component.setSmoothSeam(smoothSeamIt->second.toFloat());
         qDebug() << "Add component:" << component.id << " old:" << componentKv.first << "name:" << component.name;
         if ("partId" == linkDataType) {
             QUuid partId = oldNewIdMap[QUuid(linkData)];
@@ -1284,6 +1294,32 @@ void SkeletonDocument::setComponentInverseState(QUuid componentId, bool inverse)
     emit skeletonChanged();
 }
 
+void SkeletonDocument::setComponentSmoothAll(QUuid componentId, float toSmoothAll)
+{
+    auto component = componentMap.find(componentId);
+    if (component == componentMap.end()) {
+        qDebug() << "Component not found:" << componentId;
+        return;
+    }
+    component->second.setSmoothAll(toSmoothAll);
+    component->second.dirty = true;
+    emit componentSmoothAllChanged(componentId);
+    emit skeletonChanged();
+}
+
+void SkeletonDocument::setComponentSmoothSeam(QUuid componentId, float toSmoothSeam)
+{
+    auto component = componentMap.find(componentId);
+    if (component == componentMap.end()) {
+        qDebug() << "Component not found:" << componentId;
+        return;
+    }
+    component->second.setSmoothSeam(toSmoothSeam);
+    component->second.dirty = true;
+    emit componentSmoothSeamChanged(componentId);
+    emit skeletonChanged();
+}
+
 void SkeletonDocument::setPartSubdivState(QUuid partId, bool subdived)
 {
     auto part = partMap.find(partId);
diff --git a/src/skeletondocument.h b/src/skeletondocument.h
index b2d21358..4892f9f3 100644
--- a/src/skeletondocument.h
+++ b/src/skeletondocument.h
@@ -199,6 +199,8 @@ public:
     bool expanded = true;
     bool inverse = false;
     bool dirty = true;
+    float smoothAll = 0.0;
+    float smoothSeam = 0.0;
     std::vector<QUuid> childrenIds;
     QString linkData() const
     {
@@ -290,6 +292,34 @@ public:
         for (int i = index; i <= (int)childrenIds.size() - 2; i++)
             std::swap(childrenIds[i], childrenIds[i + 1]);
     }
+    void setSmoothAll(float toSmoothAll)
+    {
+        if (toSmoothAll < 0)
+            toSmoothAll = 0;
+        else if (toSmoothAll > 1)
+            toSmoothAll = 1;
+        smoothAll = toSmoothAll;
+    }
+    void setSmoothSeam(float toSmoothSeam)
+    {
+        if (toSmoothSeam < 0)
+            toSmoothSeam = 0;
+        else if (toSmoothSeam > 1)
+            toSmoothSeam = 1;
+        smoothSeam = toSmoothSeam;
+    }
+    bool smoothAllAdjusted() const
+    {
+        return fabs(smoothAll - 0.0) >= 0.01;
+    }
+    bool smoothSeamAdjusted() const
+    {
+        return fabs(smoothSeam - 0.0) >= 0.01;
+    }
+    bool smoothAdjusted() const
+    {
+        return smoothAllAdjusted() || smoothSeamAdjusted();
+    }
 private:
     std::set<QUuid> m_childrenIdSet;
 };
@@ -307,6 +337,8 @@ signals:
     void componentRemoved(QUuid componentId);
     void componentAdded(QUuid componentId);
     void componentExpandStateChanged(QUuid componentId);
+    void componentSmoothAllChanged(QUuid componentId);
+    void componentSmoothSeamChanged(QUuid componentId);
     void nodeRemoved(QUuid nodeId);
     void edgeRemoved(QUuid edgeId);
     void nodeRadiusChanged(QUuid nodeId);
@@ -442,6 +474,8 @@ public slots:
     void setCurrentCanvasComponentId(QUuid componentId);
     void createNewComponentAndMoveThisIn(QUuid componentId);
     void setComponentExpandState(QUuid componentId, bool expanded);
+    void setComponentSmoothAll(QUuid componentId, float toSmoothAll);
+    void setComponentSmoothSeam(QUuid componentId, float toSmoothSeam);
     void hideOtherComponents(QUuid componentId);
     void lockOtherComponents(QUuid componentId);
     void hideAllComponents();
diff --git a/src/skeletondocumentwindow.cpp b/src/skeletondocumentwindow.cpp
index 0bc945b3..86e0aa07 100644
--- a/src/skeletondocumentwindow.cpp
+++ b/src/skeletondocumentwindow.cpp
@@ -596,6 +596,8 @@ SkeletonDocumentWindow::SkeletonDocumentWindow() :
     connect(partTreeWidget, &SkeletonPartTreeWidget::createNewComponentAndMoveThisIn, m_document, &SkeletonDocument::createNewComponentAndMoveThisIn);
     connect(partTreeWidget, &SkeletonPartTreeWidget::renameComponent, m_document, &SkeletonDocument::renameComponent);
     connect(partTreeWidget, &SkeletonPartTreeWidget::setComponentExpandState, m_document, &SkeletonDocument::setComponentExpandState);
+    connect(partTreeWidget, &SkeletonPartTreeWidget::setComponentSmoothAll, m_document, &SkeletonDocument::setComponentSmoothAll);
+    connect(partTreeWidget, &SkeletonPartTreeWidget::setComponentSmoothSeam, m_document, &SkeletonDocument::setComponentSmoothSeam);
     connect(partTreeWidget, &SkeletonPartTreeWidget::moveComponent, m_document, &SkeletonDocument::moveComponent);
     connect(partTreeWidget, &SkeletonPartTreeWidget::removeComponent, m_document, &SkeletonDocument::removeComponent);
     connect(partTreeWidget, &SkeletonPartTreeWidget::hideOtherComponents, m_document, &SkeletonDocument::hideOtherComponents);
diff --git a/src/skeletonparttreewidget.cpp b/src/skeletonparttreewidget.cpp
index 87440501..3ad0df81 100644
--- a/src/skeletonparttreewidget.cpp
+++ b/src/skeletonparttreewidget.cpp
@@ -1,8 +1,12 @@
 #include <QMenu>
 #include <vector>
+#include <QVBoxLayout>
+#include <QHBoxLayout>
+#include <QWidgetAction>
 #include "skeletonparttreewidget.h"
 #include "skeletonpartwidget.h"
 #include "skeletongraphicswidget.h"
+#include "floatnumberwidget.h"
 
 SkeletonPartTreeWidget::SkeletonPartTreeWidget(const SkeletonDocument *document, QWidget *parent) :
     QTreeWidget(parent),
@@ -22,6 +26,7 @@ SkeletonPartTreeWidget::SkeletonPartTreeWidget(const SkeletonDocument *document,
     m_componentItemMap[QUuid()] = invisibleRootItem();
     
     setContextMenuPolicy(Qt::CustomContextMenu);
+    //setIconSize(QSize(Theme::miniIconFontSize, Theme::miniIconFontSize));
     
     setStyleSheet("QTreeView {qproperty-indentation: 10; margin-left: 5px; margin-top: 5px;}"
         "QTreeView::branch:has-siblings:!adjoins-item {border-image: url(:/resources/tree-vline.png);}"
@@ -30,42 +35,63 @@ SkeletonPartTreeWidget::SkeletonPartTreeWidget(const SkeletonDocument *document,
         "QTreeView::branch:has-children:!has-siblings:closed, QTreeView::branch:closed:has-children:has-siblings {border-image: none; image: url(:/resources/tree-branch-closed.png);}"
         "QTreeView::branch:open:has-children:!has-siblings, QTreeView::branch:open:has-children:has-siblings  {border-image: none; image: url(:/resources/tree-branch-open.png);}");
     
-    QFont font;
-    font.setWeight(QFont::Light);
-    font.setPixelSize(9);
-    font.setBold(false);
-    setFont(font);
+    m_normalFont.setWeight(QFont::Light);
+    m_normalFont.setPixelSize(9);
+    m_normalFont.setBold(false);
+    
+    m_selectedFont.setWeight(QFont::Light);
+    m_selectedFont.setPixelSize(9);
+    m_selectedFont.setBold(true);
+    
+    setFont(m_normalFont);
     
     connect(this, &QTreeWidget::customContextMenuRequested, this, &SkeletonPartTreeWidget::showContextMenu);
     connect(this, &QTreeWidget::itemChanged, this, &SkeletonPartTreeWidget::groupChanged);
     connect(this, &QTreeWidget::itemExpanded, this, &SkeletonPartTreeWidget::groupExpanded);
     connect(this, &QTreeWidget::itemCollapsed, this, &SkeletonPartTreeWidget::groupCollapsed);
-    connect(this, &QTreeWidget::currentItemChanged, this, &SkeletonPartTreeWidget::currentGroupChanged);
 }
 
-void SkeletonPartTreeWidget::currentGroupChanged(QTreeWidgetItem *current, QTreeWidgetItem *previous)
+void SkeletonPartTreeWidget::selectComponent(QUuid componentId)
 {
-    if (nullptr != current) {
-        auto componentId = QUuid(current->data(0, Qt::UserRole).toString());
-        const SkeletonComponent *component = m_document->findComponent(componentId);
-        if (nullptr != component) {
-            emit currentComponentChanged(componentId);
-            return;
+    if (m_currentSelectedComponent != componentId) {
+        if (!m_currentSelectedComponent.isNull()) {
+            auto item = m_componentItemMap.find(m_currentSelectedComponent);
+            if (item != m_componentItemMap.end()) {
+                item->second->setFont(0, m_normalFont);
+            }
         }
+        m_currentSelectedComponent = componentId;
+        if (!m_currentSelectedComponent.isNull()) {
+            auto item = m_componentItemMap.find(m_currentSelectedComponent);
+            if (item != m_componentItemMap.end()) {
+                item->second->setFont(0, m_selectedFont);
+            }
+        }
+        emit currentComponentChanged(m_currentSelectedComponent);
     }
-    emit currentComponentChanged(QUuid());
 }
 
 void SkeletonPartTreeWidget::mousePressEvent(QMouseEvent *event)
 {
-    QModelIndex item = indexAt(event->pos());
-    if (item.isValid()) {
-        QTreeView::mousePressEvent(event);
-    } else {
-        clearSelection();
-        QTreeView::mousePressEvent(event);
-        emit currentComponentChanged(QUuid());
+    QModelIndex itemIndex = indexAt(event->pos());
+    QTreeView::mousePressEvent(event);
+    if (itemIndex.isValid()) {
+        QTreeWidgetItem *item = itemFromIndex(itemIndex);
+        auto componentId = QUuid(item->data(0, Qt::UserRole).toString());
+        if (m_componentItemMap.find(componentId) != m_componentItemMap.end()) {
+            selectComponent(componentId);
+            return;
+        }
+        item = item->parent();
+        if (nullptr != item) {
+            componentId = QUuid(item->data(0, Qt::UserRole).toString());
+            if (m_componentItemMap.find(componentId) != m_componentItemMap.end()) {
+                selectComponent(componentId);
+                return;
+            }
+        }
     }
+    selectComponent(QUuid());
 }
 
 void SkeletonPartTreeWidget::showContextMenu(const QPoint &pos)
@@ -92,9 +118,13 @@ void SkeletonPartTreeWidget::showContextMenu(const QPoint &pos)
         contextMenu.addSection(component->name);
     
     QAction showAction(tr("Show"), this);
+    showAction.setIcon(Theme::awesome()->icon(fa::eye));
     QAction hideAction(tr("Hide"), this);
+    hideAction.setIcon(Theme::awesome()->icon(fa::eyeslash));
     QAction lockAction(tr("Lock"), this);
+    lockAction.setIcon(Theme::awesome()->icon(fa::lock));
     QAction unlockAction(tr("Unlock"), this);
+    unlockAction.setIcon(Theme::awesome()->icon(fa::unlock));
     QAction invertAction(tr("Invert"), this);
     QAction cancelInverseAction(tr("Cancel Inverse"), this);
     QAction selectAction(tr("Select"), this);
@@ -176,13 +206,22 @@ void SkeletonPartTreeWidget::showContextMenu(const QPoint &pos)
     
     contextMenu.addSeparator();
     
+    QMenu *smoothMenu = contextMenu.addMenu(tr("Smooth"));
+    QWidgetAction smoothAction(this);
+    smoothAction.setDefaultWidget(createSmoothMenuWidget(componentId));
+    smoothMenu->addAction(&smoothAction);
+    
+    contextMenu.addSeparator();
+    
     QAction hideOthersAction(tr("Hide Others"), this);
+    hideOthersAction.setIcon(Theme::awesome()->icon(fa::eyeslash));
     connect(&hideOthersAction, &QAction::triggered, [=]() {
         emit hideOtherComponents(componentId);
     });
     contextMenu.addAction(&hideOthersAction);
     
     QAction lockOthersAction(tr("Lock Others"), this);
+    lockOthersAction.setIcon(Theme::awesome()->icon(fa::lock));
     connect(&lockOthersAction, &QAction::triggered, [=]() {
         emit lockOtherComponents(componentId);
     });
@@ -205,12 +244,14 @@ void SkeletonPartTreeWidget::showContextMenu(const QPoint &pos)
     contextMenu.addSeparator();
     
     QAction hideAllAction(tr("Hide All"), this);
+    hideAllAction.setIcon(Theme::awesome()->icon(fa::eyeslash));
     connect(&hideAllAction, &QAction::triggered, [=]() {
         emit hideAllComponents();
     });
     contextMenu.addAction(&hideAllAction);
     
     QAction showAllAction(tr("Show All"), this);
+    showAllAction.setIcon(Theme::awesome()->icon(fa::eye));
     connect(&showAllAction, &QAction::triggered, [=]() {
         emit showAllComponents();
     });
@@ -219,12 +260,14 @@ void SkeletonPartTreeWidget::showContextMenu(const QPoint &pos)
     contextMenu.addSeparator();
     
     QAction lockAllAction(tr("Lock All"), this);
+    lockAllAction.setIcon(Theme::awesome()->icon(fa::lock));
     connect(&lockAllAction, &QAction::triggered, [=]() {
         emit lockAllComponents();
     });
     contextMenu.addAction(&lockAllAction);
     
     QAction unlockAllAction(tr("Unlock All"), this);
+    unlockAllAction.setIcon(Theme::awesome()->icon(fa::unlock));
     connect(&unlockAllAction, &QAction::triggered, [=]() {
         emit unlockAllComponents();
     });
@@ -234,25 +277,29 @@ void SkeletonPartTreeWidget::showContextMenu(const QPoint &pos)
     
     QMenu *moveToMenu = contextMenu.addMenu(tr("Move To"));
     
+    QAction moveToTopAction(tr("Top"), this);
+    moveToTopAction.setIcon(Theme::awesome()->icon(fa::angledoubleup));
+    connect(&moveToTopAction, &QAction::triggered, [=]() {
+        emit moveComponentToTop(componentId);
+    });
+    moveToMenu->addAction(&moveToTopAction);
+    
     QAction moveUpAction(tr("Up"), this);
+    moveUpAction.setIcon(Theme::awesome()->icon(fa::angleup));
     connect(&moveUpAction, &QAction::triggered, [=]() {
         emit moveComponentUp(componentId);
     });
     moveToMenu->addAction(&moveUpAction);
     
     QAction moveDownAction(tr("Down"), this);
+    moveDownAction.setIcon(Theme::awesome()->icon(fa::angledown));
     connect(&moveDownAction, &QAction::triggered, [=]() {
         emit moveComponentDown(componentId);
     });
     moveToMenu->addAction(&moveDownAction);
     
-    QAction moveToTopAction(tr("Top"), this);
-    connect(&moveToTopAction, &QAction::triggered, [=]() {
-        emit moveComponentToTop(componentId);
-    });
-    moveToMenu->addAction(&moveToTopAction);
-    
     QAction moveToBottomAction(tr("Bottom"), this);
+    moveToBottomAction.setIcon(Theme::awesome()->icon(fa::angledoubledown));
     connect(&moveToBottomAction, &QAction::triggered, [=]() {
         emit moveComponentToBottom(componentId);
     });
@@ -261,6 +308,7 @@ void SkeletonPartTreeWidget::showContextMenu(const QPoint &pos)
     moveToMenu->addSeparator();
     
     QAction moveToNewGroupAction(tr("New Group"), this);
+    moveToNewGroupAction.setIcon(Theme::awesome()->icon(fa::file));
     moveToMenu->addAction(&moveToNewGroupAction);
     connect(&moveToNewGroupAction, &QAction::triggered, [=]() {
         emit createNewComponentAndMoveThisIn(componentId);
@@ -297,6 +345,7 @@ void SkeletonPartTreeWidget::showContextMenu(const QPoint &pos)
     contextMenu.addSeparator();
     
     QAction deleteAction(tr("Delete"), this);
+    deleteAction.setIcon(Theme::awesome()->icon(fa::trash));
     connect(&deleteAction, &QAction::triggered, [=]() {
         emit removeComponent(componentId);
     });
@@ -309,6 +358,78 @@ void SkeletonPartTreeWidget::showContextMenu(const QPoint &pos)
     }
 }
 
+QWidget *SkeletonPartTreeWidget::createSmoothMenuWidget(QUuid componentId)
+{
+    QWidget *popup = new QWidget;
+    
+    const SkeletonComponent *component = m_document->findComponent(componentId);
+    if (!component) {
+        qDebug() << "Find component failed:" << componentId;
+        return popup;
+    }
+    
+    bool showSeamControl = component->linkToPartId.isNull();
+    
+    FloatNumberWidget *smoothAllWidget = new FloatNumberWidget;
+    smoothAllWidget->setItemName(tr("All"));
+    smoothAllWidget->setRange(0, 1);
+    smoothAllWidget->setValue(component->smoothAll);
+    
+    connect(smoothAllWidget, &FloatNumberWidget::valueChanged, [=](float value) {
+        emit setComponentSmoothAll(componentId, value);
+        emit groupOperationAdded();
+    });
+    
+    QPushButton *smoothAllEraser = new QPushButton(QChar(fa::eraser));
+    Theme::initAwesomeToolButton(smoothAllEraser);
+    
+    connect(smoothAllEraser, &QPushButton::clicked, [=]() {
+        smoothAllWidget->setValue(0.0);
+    });
+    
+    FloatNumberWidget *smoothSeamWidget = nullptr;
+    QPushButton *smoothSeamEraser = nullptr;
+    
+    if (showSeamControl) {
+        smoothSeamWidget = new FloatNumberWidget;
+        smoothSeamWidget->setItemName(tr("Seam"));
+        smoothSeamWidget->setRange(0, 1);
+        smoothSeamWidget->setValue(component->smoothSeam);
+        
+        connect(smoothSeamWidget, &FloatNumberWidget::valueChanged, [=](float value) {
+            emit setComponentSmoothSeam(componentId, value);
+            emit groupOperationAdded();
+        });
+    
+        smoothSeamEraser = new QPushButton(QChar(fa::eraser));
+        Theme::initAwesomeToolButton(smoothSeamEraser);
+        
+        connect(smoothSeamEraser, &QPushButton::clicked, [=]() {
+            smoothSeamWidget->setValue(0.0);
+        });
+    }
+    
+    QHBoxLayout *smoothSeamLayout = nullptr;
+    
+    QVBoxLayout *layout = new QVBoxLayout;
+    QHBoxLayout *smoothAllLayout = new QHBoxLayout;
+    if (showSeamControl)
+        smoothSeamLayout = new QHBoxLayout;
+    smoothAllLayout->addWidget(smoothAllEraser);
+    smoothAllLayout->addWidget(smoothAllWidget);
+    if (showSeamControl) {
+        smoothSeamLayout->addWidget(smoothSeamEraser);
+        smoothSeamLayout->addWidget(smoothSeamWidget);
+    }
+    layout->addLayout(smoothAllLayout);
+    if (showSeamControl)
+        layout->addLayout(smoothSeamLayout);
+    
+    popup->setLayout(layout);
+    
+    return popup;
+}
+
 QTreeWidgetItem *SkeletonPartTreeWidget::findComponentItem(QUuid componentId)
 {
     auto findResult = m_componentItemMap.find(componentId);
@@ -379,7 +500,7 @@ void SkeletonPartTreeWidget::addComponentChildrenToItem(QUuid componentId, QTree
             item->setData(0, Qt::UserRole, QVariant(component->id.toString()));
             item->setChildIndicatorPolicy(QTreeWidgetItem::ShowIndicator);
             item->setExpanded(component->expanded);
-            item->setFlags(item->flags() | Qt::ItemIsEditable | Qt::ItemIsEnabled | Qt::ItemIsSelectable);
+            item->setFlags((item->flags() | Qt::ItemIsEditable | Qt::ItemIsEnabled) & ~(Qt::ItemIsSelectable));
             m_componentItemMap[childId] = item;
             addComponentChildrenToItem(childId, item);
         }
diff --git a/src/skeletonparttreewidget.h b/src/skeletonparttreewidget.h
index 94505e9f..08043f76 100644
--- a/src/skeletonparttreewidget.h
+++ b/src/skeletonparttreewidget.h
@@ -20,6 +20,8 @@ signals:
     void createNewComponentAndMoveThisIn(QUuid componentId);
     void renameComponent(QUuid componentId, QString name);
     void setComponentExpandState(QUuid componentId, bool expanded);
+    void setComponentSmoothAll(QUuid componentId, float toSmoothAll);
+    void setComponentSmoothSeam(QUuid componentId, float toSmoothSeam);
     void moveComponent(QUuid componentId, QUuid toParentId);
     void removeComponent(QUuid componentId);
     void hideOtherComponents(QUuid componentId);
@@ -38,6 +40,7 @@ signals:
     void lockDescendantComponents(QUuid componentId);
     void unlockDescendantComponents(QUuid componentId);
     void addPartToSelection(QUuid partId);
+    void groupOperationAdded();
 public:
     SkeletonPartTreeWidget(const SkeletonDocument *document, QWidget *parent);
     QTreeWidgetItem *findComponentItem(QUuid componentId);
@@ -64,7 +67,6 @@ public slots:
     void groupChanged(QTreeWidgetItem *item, int column);
     void groupExpanded(QTreeWidgetItem *item);
     void groupCollapsed(QTreeWidgetItem *item);
-    void currentGroupChanged(QTreeWidgetItem *current, QTreeWidgetItem *previous);
     void removeAllContent();
     void showContextMenu(const QPoint &pos);
 protected:
@@ -74,11 +76,16 @@ protected:
 private:
     void addComponentChildrenToItem(QUuid componentId, QTreeWidgetItem *parentItem);
     void deleteItemChildren(QTreeWidgetItem *item);
+    void selectComponent(QUuid componentId);
+    QWidget *createSmoothMenuWidget(QUuid componentId);
 private:
     const SkeletonDocument *m_document = nullptr;
     std::map<QUuid, QTreeWidgetItem *> m_partItemMap;
     std::map<QUuid, QTreeWidgetItem *> m_componentItemMap;
     SkeletonGraphicsFunctions *m_graphicsFunctions = nullptr;
+    QFont m_normalFont;
+    QFont m_selectedFont;
+    QUuid m_currentSelectedComponent;
 };
 
 #endif
diff --git a/src/skeletonpartwidget.cpp b/src/skeletonpartwidget.cpp
index 3adcbfdb..5df4799f 100644
--- a/src/skeletonpartwidget.cpp
+++ b/src/skeletonpartwidget.cpp
@@ -263,15 +263,12 @@ void SkeletonPartWidget::mouseDoubleClickEvent(QMouseEvent *event)
 
 void SkeletonPartWidget::initToolButtonWithoutFont(QPushButton *button)
 {
-    button->setFixedSize(Theme::toolIconSize / 2, Theme::toolIconSize / 2);
-    button->setStyleSheet("QPushButton {color: #f7d9c8}");
-    button->setFocusPolicy(Qt::NoFocus);
+    Theme::initAwesomeToolButtonWithoutFont(button);
 }
 
 void SkeletonPartWidget::initToolButton(QPushButton *button)
 {
-    button->setFont(Theme::awesome()->font(Theme::toolIconFontSize / 2));
-    initToolButtonWithoutFont(button);
+    Theme::initAwesomeToolButton(button);
 }
 
 void SkeletonPartWidget::showColorSettingPopup(const QPoint &pos)
@@ -289,10 +286,6 @@ void SkeletonPartWidget::showColorSettingPopup(const QPoint &pos)
     QPushButton *colorEraser = new QPushButton(QChar(fa::eraser));
     initToolButton(colorEraser);
     
-    //QLabel *colorPreviewLabel = new QLabel;
-    //colorPreviewLabel->setFixedSize(Theme::miniIconSize, Theme::miniIconSize);
-    //colorPreviewLabel->setAutoFillBackground(true);
-    
     QPushButton *pickButton = new QPushButton();
     initToolButtonWithoutFont(pickButton);
     QPalette palette = pickButton->palette();
@@ -343,14 +336,17 @@ void SkeletonPartWidget::showDeformSettingPopup(const QPoint &pos)
     QWidget *popup = new QWidget;
     
     FloatNumberWidget *thicknessWidget = new FloatNumberWidget;
+    thicknessWidget->setItemName(tr("Thickness"));
     thicknessWidget->setRange(0, 2);
     thicknessWidget->setValue(part->deformThickness);
     
     connect(thicknessWidget, &FloatNumberWidget::valueChanged, [=](float value) {
         emit setPartDeformThickness(m_partId, value);
+        emit groupOperationAdded();
     });
     
     FloatNumberWidget *widthWidget = new FloatNumberWidget;
+    widthWidget->setItemName(tr("Width"));
     widthWidget->setRange(0, 2);
     widthWidget->setValue(part->deformWidth);
     
@@ -364,6 +360,7 @@ void SkeletonPartWidget::showDeformSettingPopup(const QPoint &pos)
     
     connect(thicknessEraser, &QPushButton::clicked, [=]() {
         thicknessWidget->setValue(1.0);
+        emit groupOperationAdded();
     });
     
     QPushButton *widthEraser = new QPushButton(QChar(fa::eraser));
@@ -371,6 +368,7 @@ void SkeletonPartWidget::showDeformSettingPopup(const QPoint &pos)
     
     connect(widthEraser, &QPushButton::clicked, [=]() {
         widthWidget->setValue(1.0);
+        emit groupOperationAdded();
     });
     
     QVBoxLayout *layout = new QVBoxLayout;
@@ -385,35 +383,22 @@ void SkeletonPartWidget::showDeformSettingPopup(const QPoint &pos)
     
     popup->setLayout(layout);
     
-    QWidgetAction *action = new QWidgetAction(this);
-    action->setDefaultWidget(popup);
+    QWidgetAction action(this);
+    action.setDefaultWidget(popup);
     
-    popupMenu.addAction(action);
+    popupMenu.addAction(&action);
     
     popupMenu.exec(mapToGlobal(pos));
 }
 
 void SkeletonPartWidget::initButton(QPushButton *button)
 {
-    button->setFont(Theme::awesome()->font(Theme::miniIconFontSize));
-    button->setFixedSize(Theme::miniIconSize, Theme::miniIconSize);
-    button->setFocusPolicy(Qt::NoFocus);
+    Theme::initAwesomeMiniButton(button);
 }
 
 void SkeletonPartWidget::updateButton(QPushButton *button, QChar icon, bool highlighted)
 {
-    button->setText(icon);
-    QColor color;
-    if (highlighted)
-        color = QColor("#fc6621");
-    else
-        color = QColor("#525252");
-
-    color = color.toHsv();
-    color.setHsv(color.hue(), color.saturation() / 5, color.value() * 2 / 3);
-    color = color.toRgb();
-
-    button->setStyleSheet("QPushButton {border: none; background: none; color: " + color.name() + ";}");
+    Theme::updateAwesomeMiniButton(button, icon, highlighted);
 }
 
 void SkeletonPartWidget::updatePreview()
diff --git a/src/theme.cpp b/src/theme.cpp
index 85d46755..9054f2d0 100644
--- a/src/theme.cpp
+++ b/src/theme.cpp
@@ -92,4 +92,39 @@ void Theme::initAwesomeLabel(QLabel *label)
     label->setStyleSheet("QLabel {color: #f7d9c8}");
 }
 
+void Theme::initAwesomeMiniButton(QPushButton *button)
+{
+    button->setFont(Theme::awesome()->font(Theme::miniIconFontSize));
+    button->setFixedSize(Theme::miniIconSize, Theme::miniIconSize);
+    button->setFocusPolicy(Qt::NoFocus);
+}
+
+void Theme::updateAwesomeMiniButton(QPushButton *button, QChar icon, bool highlighted)
+{
+    button->setText(icon);
+    QColor color;
+    if (highlighted)
+        color = QColor("#fc6621");
+    else
+        color = QColor("#525252");
+
+    color = color.toHsv();
+    color.setHsv(color.hue(), color.saturation() / 5, color.value() * 2 / 3);
+    color = color.toRgb();
+
+    button->setStyleSheet("QPushButton {border: none; background: none; color: " + color.name() + ";}");
+}
+
+void Theme::initAwesomeToolButtonWithoutFont(QPushButton *button)
+{
+    button->setFixedSize(Theme::toolIconSize / 2, Theme::toolIconSize / 2);
+    button->setStyleSheet("QPushButton {color: #f7d9c8}");
+    button->setFocusPolicy(Qt::NoFocus);
+}
+
+void Theme::initAwesomeToolButton(QPushButton *button)
+{
+    button->setFont(Theme::awesome()->font(Theme::toolIconFontSize / 2));
+    Theme::initAwesomeToolButtonWithoutFont(button);
+}
 
diff --git a/src/theme.h b/src/theme.h
index e077e4cf..f54218f1 100644
--- a/src/theme.h
+++ b/src/theme.h
@@ -40,6 +40,10 @@ public:
     static void initAwesomeButton(QPushButton *button);
     static void initAwesomeLabel(QLabel *label);
     static void initAwesomeSmallButton(QPushButton *button);
+    static void initAwesomeMiniButton(QPushButton *button);
+    static void updateAwesomeMiniButton(QPushButton *button, QChar icon, bool highlighted);
+    static void initAwesomeToolButton(QPushButton *button);
+    static void initAwesomeToolButtonWithoutFont(QPushButton *button);
 };
 
 #endif
diff --git a/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite.dll b/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite.dll
index fcbed62b..8713069b 100644
Binary files a/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite.dll and b/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite.dll differ
diff --git a/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite.dll.lib b/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite.dll.lib
index 7f113f7d..0cd8d14b 100644
Binary files a/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite.dll.lib and b/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite.dll.lib differ
diff --git a/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite.h b/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite.h
index 47ab475a..2b35b8cd 100644
--- a/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite.h
+++ b/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite.h
@@ -59,6 +59,8 @@ int meshlite_skeletonmesh_create(void *context);
 int meshlite_skeletonmesh_set_end_radius(void *context, float radius);
 int meshlite_skeletonmesh_add_bone(void *context, int sklt_id, float from_x, float from_y, float from_z, float to_x, float to_y, float to_z);
 int meshlite_skeletonmesh_generate_mesh(void *context, int sklt_id);
+int meshlite_smooth_vertices(void *context, int mesh_id, float factor, int *buffer, int max_buffer_len);
+int meshlite_smooth(void *context, int mesh_id, float factor);
 
 #ifdef __cplusplus
 }
diff --git a/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite.dll b/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite.dll
index 80dbab3f..b596e8b7 100644
Binary files a/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite.dll and b/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite.dll differ
diff --git a/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite.dll.lib b/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite.dll.lib
index a1f34716..572ebc23 100644
Binary files a/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite.dll.lib and b/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite.dll.lib differ
diff --git a/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite.h b/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite.h
index 47ab475a..2b35b8cd 100644
--- a/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite.h
+++ b/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite.h
@@ -59,6 +59,8 @@ int meshlite_skeletonmesh_create(void *context);
 int meshlite_skeletonmesh_set_end_radius(void *context, float radius);
 int meshlite_skeletonmesh_add_bone(void *context, int sklt_id, float from_x, float from_y, float from_z, float to_x, float to_y, float to_z);
 int meshlite_skeletonmesh_generate_mesh(void *context, int sklt_id);
+int meshlite_smooth_vertices(void *context, int mesh_id, float factor, int *buffer, int max_buffer_len);
+int meshlite_smooth(void *context, int mesh_id, float factor);
 
 #ifdef __cplusplus
 }