diff --git a/dust3d.pro b/dust3d.pro
index 9d82921f..a83c7a74 100644
--- a/dust3d.pro
+++ b/dust3d.pro
@@ -291,6 +291,12 @@ HEADERS += src/skeletondocument.h
 SOURCES += src/posedocument.cpp
 HEADERS += src/posedocument.h
 
+SOURCES += src/combinemode.cpp
+HEADERS += src/combinemode.h
+
+SOURCES += src/meshinflate.cpp
+HEADERS += src/meshinflate.h
+
 SOURCES += src/main.cpp
 
 HEADERS += src/version.h
diff --git a/src/combinemode.cpp b/src/combinemode.cpp
new file mode 100644
index 00000000..4087cdd5
--- /dev/null
+++ b/src/combinemode.cpp
@@ -0,0 +1,6 @@
+#include <QObject>
+#include "combinemode.h"
+
+IMPL_CombineModeToString
+IMPL_CombineModeFromString
+IMPL_CombineModeToDispName
diff --git a/src/combinemode.h b/src/combinemode.h
new file mode 100644
index 00000000..9ec4a328
--- /dev/null
+++ b/src/combinemode.h
@@ -0,0 +1,56 @@
+#ifndef DUST3D_COMBINE_MODE_H
+#define DUST3D_COMBINE_MODE_H
+#include <QString>
+
+enum class CombineMode
+{
+    Normal = 0,
+    Inversion,
+    Inflation,
+    Count
+};
+CombineMode CombineModeFromString(const char *modeString);
+#define IMPL_CombineModeFromString                                  \
+CombineMode CombineModeFromString(const char *modeString)           \
+{                                                                   \
+    QString mode = modeString;                                      \
+    if (mode == "Normal")                                           \
+        return CombineMode::Normal;                                 \
+    if (mode == "Inversion")                                        \
+        return CombineMode::Inversion;                              \
+    if (mode == "Inflation")                                        \
+        return CombineMode::Inflation;                              \
+    return CombineMode::Normal;                                     \
+}
+const char *CombineModeToString(CombineMode mode);
+#define IMPL_CombineModeToString                                    \
+const char *CombineModeToString(CombineMode mode)                   \
+{                                                                   \
+    switch (mode) {                                                 \
+        case CombineMode::Normal:                                   \
+            return "Normal";                                        \
+        case CombineMode::Inversion:                                \
+            return "Inversion";                                     \
+        case CombineMode::Inflation:                                \
+            return "Inflation";                                     \
+        default:                                                    \
+            return "Normal";                                        \
+    }                                                               \
+}
+QString CombineModeToDispName(CombineMode mode);
+#define IMPL_CombineModeToDispName                                  \
+QString CombineModeToDispName(CombineMode mode)                     \
+{                                                                   \
+    switch (mode) {                                                 \
+        case CombineMode::Normal:                                   \
+            return QObject::tr("Normal");                           \
+        case CombineMode::Inversion:                                \
+            return QObject::tr("Inversion");                        \
+        case CombineMode::Inflation:                                \
+            return QObject::tr("Inflation");                        \
+        default:                                                    \
+            return QObject::tr("Normal");                           \
+    }                                                               \
+}
+
+#endif
diff --git a/src/document.cpp b/src/document.cpp
index c96c343b..4997b8bd 100644
--- a/src/document.cpp
+++ b/src/document.cpp
@@ -906,7 +906,7 @@ void Document::toSnapshot(Snapshot *snapshot, const std::set<QUuid> &limitNodeId
             if (!componentIt.second.name.isEmpty())
                 component["name"] = componentIt.second.name;
             component["expanded"] = componentIt.second.expanded ? "true" : "false";
-            component["inverse"] = componentIt.second.inverse ? "true" : "false";
+            component["combineMode"] = CombineModeToString(componentIt.second.combineMode);
             component["dirty"] = componentIt.second.dirty ? "true" : "false";
             if (componentIt.second.smoothAllAdjusted())
                 component["smoothAll"] = QString::number(componentIt.second.smoothAll);
@@ -1181,7 +1181,11 @@ void Document::addFromSnapshot(const Snapshot &snapshot, bool fromPaste)
         oldNewIdMap[QUuid(componentKv.first)] = component.id;
         component.name = valueOfKeyInMapOrEmpty(componentKv.second, "name");
         component.expanded = isTrueValueString(valueOfKeyInMapOrEmpty(componentKv.second, "expanded"));
-        component.inverse = isTrueValueString(valueOfKeyInMapOrEmpty(componentKv.second, "inverse"));
+        component.combineMode = CombineModeFromString(valueOfKeyInMapOrEmpty(componentKv.second, "combineMode").toUtf8().constData());
+        if (component.combineMode == CombineMode::Normal) {
+            if (isTrueValueString(valueOfKeyInMapOrEmpty(componentKv.second, "inverse")))
+                component.combineMode = CombineMode::Inversion;
+        }
         const auto &smoothAllIt = componentKv.second.find("smoothAll");
         if (smoothAllIt != componentKv.second.end())
             component.setSmoothAll(smoothAllIt->second.toFloat());
@@ -1195,7 +1199,7 @@ void Document::addFromSnapshot(const Snapshot &snapshot, bool fromPaste)
             //qDebug() << "Add part:" << partId << " from component:" << component.id;
             partMap[partId].componentId = component.id;
             if (inversePartIds.find(partId) != inversePartIds.end())
-                component.inverse = true;
+                component.combineMode = CombineMode::Inversion;
         }
         componentMap[component.id] = component;
         newAddedComponentIds.insert(component.id);
@@ -1615,18 +1619,18 @@ void Document::setPartVisibleState(QUuid partId, bool visible)
     emit optionsChanged();
 }
 
-void Document::setComponentInverseState(QUuid componentId, bool inverse)
+void Document::setComponentCombineMode(QUuid componentId, CombineMode combineMode)
 {
     auto component = componentMap.find(componentId);
     if (component == componentMap.end()) {
         qDebug() << "Component not found:" << componentId;
         return;
     }
-    if (component->second.inverse == inverse)
+    if (component->second.combineMode == combineMode)
         return;
-    component->second.inverse = inverse;
+    component->second.combineMode = combineMode;
     component->second.dirty = true;
-    emit componentInverseStateChanged(componentId);
+    emit componentCombineModeChanged(componentId);
     emit skeletonChanged();
 }
 
diff --git a/src/document.h b/src/document.h
index 5bcfdbbd..97cb815d 100644
--- a/src/document.h
+++ b/src/document.h
@@ -24,6 +24,7 @@
 #include "interpolationtype.h"
 #include "jointnodetree.h"
 #include "skeletondocument.h"
+#include "combinemode.h"
 
 class MaterialPreviewsGenerator;
 class MotionsGenerator;
@@ -55,7 +56,7 @@ public:
     QUuid linkToPartId;
     QUuid parentId;
     bool expanded = true;
-    bool inverse = false;
+    CombineMode combineMode = CombineMode::Normal;
     bool dirty = true;
     float smoothAll = 0.0;
     float smoothSeam = 0.0;
@@ -401,7 +402,7 @@ signals:
     void partColorStateChanged(QUuid partId);
     void partWrapStateChanged(QUuid partId);
     void partMaterialIdChanged(QUuid partId);
-    void componentInverseStateChanged(QUuid partId);
+    void componentCombineModeChanged(QUuid componentId);
     void cleanup();
     void originChanged();
     void xlockStateChanged();
@@ -550,7 +551,7 @@ public slots:
     void setPartColorState(QUuid partId, bool hasColor, QColor color);
     void setPartWrapState(QUuid partId, bool wrapped);
     void setPartMaterialId(QUuid partId, QUuid materialId);
-    void setComponentInverseState(QUuid componentId, bool inverse);
+    void setComponentCombineMode(QUuid componentId, CombineMode combineMode);
     void moveComponentUp(QUuid componentId);
     void moveComponentDown(QUuid componentId);
     void moveComponentToTop(QUuid componentId);
diff --git a/src/documentwindow.cpp b/src/documentwindow.cpp
index 8ad85a65..21074683 100644
--- a/src/documentwindow.cpp
+++ b/src/documentwindow.cpp
@@ -783,7 +783,7 @@ DocumentWindow::DocumentWindow() :
     connect(partTreeWidget, &PartTreeWidget::unlockAllComponents, m_document, &Document::unlockAllComponents);
     connect(partTreeWidget, &PartTreeWidget::setPartLockState, m_document, &Document::setPartLockState);
     connect(partTreeWidget, &PartTreeWidget::setPartVisibleState, m_document, &Document::setPartVisibleState);
-    connect(partTreeWidget, &PartTreeWidget::setComponentInverseState, m_document, &Document::setComponentInverseState);
+    connect(partTreeWidget, &PartTreeWidget::setComponentCombineMode, m_document, &Document::setComponentCombineMode);
     connect(partTreeWidget, &PartTreeWidget::hideDescendantComponents, m_document, &Document::hideDescendantComponents);
     connect(partTreeWidget, &PartTreeWidget::showDescendantComponents, m_document, &Document::showDescendantComponents);
     connect(partTreeWidget, &PartTreeWidget::lockDescendantComponents, m_document, &Document::lockDescendantComponents);
@@ -796,6 +796,7 @@ DocumentWindow::DocumentWindow() :
     connect(m_document, &Document::componentRemoved, partTreeWidget, &PartTreeWidget::componentRemoved);
     connect(m_document, &Document::componentAdded, partTreeWidget, &PartTreeWidget::componentAdded);
     connect(m_document, &Document::componentExpandStateChanged, partTreeWidget, &PartTreeWidget::componentExpandStateChanged);
+    connect(m_document, &Document::componentCombineModeChanged, partTreeWidget, &PartTreeWidget::componentCombineModeChanged);
     connect(m_document, &Document::partPreviewChanged, partTreeWidget, &PartTreeWidget::partPreviewChanged);
     connect(m_document, &Document::partLockStateChanged, partTreeWidget, &PartTreeWidget::partLockStateChanged);
     connect(m_document, &Document::partVisibleStateChanged, partTreeWidget, &PartTreeWidget::partVisibleStateChanged);
diff --git a/src/graphicscontainerwidget.cpp b/src/graphicscontainerwidget.cpp
index c9b9846e..b0aed1fd 100644
--- a/src/graphicscontainerwidget.cpp
+++ b/src/graphicscontainerwidget.cpp
@@ -1,7 +1,6 @@
 #include "graphicscontainerwidget.h"
 
-GraphicsContainerWidget::GraphicsContainerWidget() :
-    m_graphicsWidget(nullptr)
+GraphicsContainerWidget::GraphicsContainerWidget()
 {
 }
 
@@ -31,11 +30,16 @@ void GraphicsContainerWidget::mouseReleaseEvent(QMouseEvent *event)
 
 void GraphicsContainerWidget::wheelEvent(QWheelEvent *event)
 {
+    if (m_graphicsWidget) {
+        m_graphicsWidget->inputWheelEventFromOtherWidget(event);
+        return;
+    }
+        
     if (m_modelWidget)
         m_modelWidget->inputWheelEventFromOtherWidget(event);
 }
 
-void GraphicsContainerWidget::setGraphicsWidget(QWidget *graphicsWidget)
+void GraphicsContainerWidget::setGraphicsWidget(SkeletonGraphicsWidget *graphicsWidget)
 {
     m_graphicsWidget = graphicsWidget;
 }
diff --git a/src/graphicscontainerwidget.h b/src/graphicscontainerwidget.h
index cd0cbff5..987d158c 100644
--- a/src/graphicscontainerwidget.h
+++ b/src/graphicscontainerwidget.h
@@ -5,6 +5,7 @@
 #include <QMouseEvent>
 #include <QWheelEvent>
 #include "modelwidget.h"
+#include "skeletongraphicswidget.h"
 
 class GraphicsContainerWidget : public QWidget
 {
@@ -13,7 +14,7 @@ signals:
     void containerSizeChanged(QSize size);
 public:
     GraphicsContainerWidget();
-    void setGraphicsWidget(QWidget *graphicsWidget);
+    void setGraphicsWidget(SkeletonGraphicsWidget *graphicsWidget);
     void setModelWidget(ModelWidget *modelWidget);
 protected:
     void resizeEvent(QResizeEvent *event) override;
@@ -22,8 +23,8 @@ protected:
     void mouseReleaseEvent(QMouseEvent *event) override;
     void wheelEvent(QWheelEvent *event) override;
 private:
-    QWidget *m_graphicsWidget = nullptr;
     ModelWidget *m_modelWidget = nullptr;
+    SkeletonGraphicsWidget *m_graphicsWidget = nullptr;
 };
 
 #endif
diff --git a/src/meshgenerator.cpp b/src/meshgenerator.cpp
index f7824b4d..e610cd16 100644
--- a/src/meshgenerator.cpp
+++ b/src/meshgenerator.cpp
@@ -14,6 +14,7 @@
 #include "imageforever.h"
 #include "material.h"
 #include "trianglesourcenoderesolve.h"
+#include "meshinflate.h"
 
 bool MeshGenerator::m_enableDebug = false;
 PositionMap<int> *MeshGenerator::m_forMakePositionKey = new PositionMap<int>;
@@ -225,7 +226,7 @@ bool MeshGenerator::checkIsPartDirty(QString partId)
     return isTrueValueString(valueOfKeyInMapOrEmpty(findPart->second, "dirty"));
 }
 
-void *MeshGenerator::combinePartMesh(QString partId)
+void *MeshGenerator::combinePartMesh(QString partId, std::vector<std::pair<QVector3D, float>> *balls)
 {
     auto findPart = m_snapshot->parts.find(partId);
     if (findPart == m_snapshot->parts.end()) {
@@ -306,6 +307,13 @@ void *MeshGenerator::combinePartMesh(QString partId)
         nodeInfo.position = QVector3D(x, y, z);
         nodeInfo.radius = radius;
         nodeInfo.boneMark = boneMark;
+        
+        if (nullptr != balls) {
+            balls->push_back({QVector3D(x, y, z), radius});
+            if (xMirrored) {
+                balls->push_back({QVector3D(-x, y, z), radius});
+            }
+        }
     }
     std::set<std::pair<QString, QString>> edges;
     for (const auto &edgeId: m_partEdgeIds[partId]) {
@@ -499,12 +507,10 @@ bool MeshGenerator::checkIsComponentDirty(QString componentId)
     return isDirty;
 }
 
-void *MeshGenerator::combineComponentMesh(QString componentId, bool *inverse)
+void *MeshGenerator::combineComponentMesh(QString componentId, CombineMode *combineMode, std::vector<std::pair<QVector3D, float>> *inflateBalls)
 {
     QUuid componentIdNotAsString;
     
-    *inverse = false;
-    
     const std::map<QString, QString> *component = &m_snapshot->rootComponent;
     if (componentId != QUuid().toString()) {
         componentIdNotAsString = QUuid(componentId);
@@ -516,15 +522,26 @@ void *MeshGenerator::combineComponentMesh(QString componentId, bool *inverse)
         component = &findComponent->second;
     }
     
-    if (isTrueValueString(valueOfKeyInMapOrEmpty(*component, "inverse")))
-        *inverse = true;
+    *combineMode = CombineModeFromString(valueOfKeyInMapOrEmpty(*component, "combineMode").toUtf8().constData());
     
-    if (m_dirtyComponentIds.find(componentId) == m_dirtyComponentIds.end()) {
-        auto findCachedMesh = m_cacheContext->componentCombinableMeshs.find(componentId);
-        if (findCachedMesh != m_cacheContext->componentCombinableMeshs.end() &&
-                nullptr != findCachedMesh->second) {
-            //qDebug() << "Component mesh cache used:" << componentId;
-            return cloneCombinableMesh(findCachedMesh->second);
+    if (*combineMode == CombineMode::Inflation) {
+        if (m_dirtyComponentIds.find(componentId) == m_dirtyComponentIds.end()) {
+            auto findCacheInflateBalls = m_cacheContext->componentInflateBalls.find(componentId);
+            if (findCacheInflateBalls != m_cacheContext->componentInflateBalls.end()) {
+                *inflateBalls = findCacheInflateBalls->second;
+                return nullptr;
+            }
+        }
+    }
+    
+    if (*combineMode != CombineMode::Inflation) {
+        if (m_dirtyComponentIds.find(componentId) == m_dirtyComponentIds.end()) {
+            auto findCachedMesh = m_cacheContext->componentCombinableMeshs.find(componentId);
+            if (findCachedMesh != m_cacheContext->componentCombinableMeshs.end() &&
+                    nullptr != findCachedMesh->second) {
+                //qDebug() << "Component mesh cache used:" << componentId;
+                return cloneCombinableMesh(findCachedMesh->second);
+            }
         }
     }
     
@@ -552,17 +569,47 @@ void *MeshGenerator::combineComponentMesh(QString componentId, bool *inverse)
     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.first.x(), bmeshVertex.first.y(), bmeshVertex.first.z(),
-                bmeshVertex);
+        std::vector<std::pair<QVector3D, float>> partBalls;
+        resultMesh = combinePartMesh(partId, &partBalls);
+        if (*combineMode == CombineMode::Inflation) {
+            deleteCombinableMesh(resultMesh);
+            resultMesh = nullptr;
+            inflateBalls->insert(inflateBalls->end(), partBalls.begin(), partBalls.end());
+        } else {
+            for (const auto &bmeshVertex: m_cacheContext->partBmeshVertices[partId]) {
+                verticesSources.addPosition(bmeshVertex.first.x(), bmeshVertex.first.y(), bmeshVertex.first.z(),
+                    bmeshVertex);
+            }
         }
     } else {
         for (const auto &childId: valueOfKeyInMapOrEmpty(*component, "children").split(",")) {
             if (childId.isEmpty())
                 continue;
-            bool childInverse = false;
-            void *childCombinedMesh = combineComponentMesh(childId, &childInverse);
+            CombineMode childCombineMode = CombineMode::Normal;
+            std::vector<std::pair<QVector3D, float>> childInflateBalls;
+            void *childCombinedMesh = combineComponentMesh(childId, &childCombineMode, &childInflateBalls);
+            inflateBalls->insert(inflateBalls->end(), childInflateBalls.begin(), childInflateBalls.end());
+            if (childCombineMode == CombineMode::Inflation) {
+                deleteCombinableMesh(childCombinedMesh);
+                childCombinedMesh = nullptr;
+                if (nullptr == resultMesh)
+                    continue;
+                std::vector<std::pair<QVector3D, QVector3D>> inflatedVertices;
+                void *inflatedMesh = meshInflate(resultMesh, childInflateBalls, inflatedVertices);
+                deleteCombinableMesh(resultMesh);
+                resultMesh = inflatedMesh;
+                for (const auto &item: inflatedVertices) {
+                    const auto &oldPosition = item.first;
+                    const auto &newPosition = item.second;
+                    std::pair<QVector3D, std::pair<QUuid, QUuid>> source;
+                    if (verticesSources.findPosition(oldPosition.x(), oldPosition.y(), oldPosition.z(), &source)) {
+                        verticesSources.removePosition(oldPosition.x(), oldPosition.y(), oldPosition.z());
+                        source.first = newPosition;
+                        verticesSources.addPosition(newPosition.x(), newPosition.y(), newPosition.z(), source);
+                    }
+                }
+                continue;
+            }
             for (const auto &positionIt: m_cacheContext->componentPositions[childId]) {
                 positionsBeforeCombination.addPosition(positionIt.x(), positionIt.y(), positionIt.z(), true);
             }
@@ -572,13 +619,13 @@ void *MeshGenerator::combineComponentMesh(QString componentId, bool *inverse)
             if (nullptr == childCombinedMesh)
                 continue;
             if (nullptr == resultMesh) {
-                if (childInverse) {
+                if (childCombineMode == CombineMode::Inversion) {
                     deleteCombinableMesh(childCombinedMesh);
                 } else {
                     resultMesh = childCombinedMesh;
                 }
             } else {
-                void *newResultMesh = childInverse ? diffCombinableMeshs(resultMesh, childCombinedMesh) : unionCombinableMeshs(resultMesh, childCombinedMesh);
+                void *newResultMesh = childCombineMode == CombineMode::Inversion ? diffCombinableMeshs(resultMesh, childCombinedMesh) : unionCombinableMeshs(resultMesh, childCombinedMesh);
                 deleteCombinableMesh(childCombinedMesh);
                 if (nullptr != newResultMesh) {
                     deleteCombinableMesh(resultMesh);
@@ -643,6 +690,8 @@ void *MeshGenerator::combineComponentMesh(QString componentId, bool *inverse)
         }
     }
     
+    m_cacheContext->componentInflateBalls[componentId] = *inflateBalls;
+    
     m_cacheContext->updateComponentCombinableMesh(componentId, resultMesh);
     auto &cachedComponentPositions = m_cacheContext->componentPositions[componentId];
     cachedComponentPositions.clear();
@@ -712,6 +761,13 @@ void MeshGenerator::generate()
             }
             it++;
         }
+        for (auto it = m_cacheContext->componentInflateBalls.begin(); it != m_cacheContext->componentInflateBalls.end(); ) {
+            if (m_snapshot->components.find(it->first) == m_snapshot->components.end()) {
+                it = m_cacheContext->componentInflateBalls.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);
@@ -732,8 +788,9 @@ void MeshGenerator::generate()
     
     int resultMeshId = 0;
     
-    bool inverse = false;
-    void *combinedMesh = combineComponentMesh(QUuid().toString(), &inverse);
+    CombineMode combineMode;
+    std::vector<std::pair<QVector3D, float>> inflateBalls;
+    void *combinedMesh = combineComponentMesh(QUuid().toString(), &combineMode, &inflateBalls);
     if (nullptr != combinedMesh) {
         resultMeshId = convertFromCombinableMesh(m_meshliteContext, combinedMesh);
         deleteCombinableMesh(combinedMesh);
diff --git a/src/meshgenerator.h b/src/meshgenerator.h
index 1b11b95e..b87e758b 100644
--- a/src/meshgenerator.h
+++ b/src/meshgenerator.h
@@ -11,6 +11,7 @@
 #include "meshloader.h"
 #include "outcome.h"
 #include "positionmap.h"
+#include "combinemode.h"
 
 class GeneratedCacheContext
 {
@@ -23,6 +24,7 @@ public:
     std::map<QString, std::vector<QVector3D>> componentPositions;
     std::map<QString, PositionMap<std::pair<QVector3D, std::pair<QUuid, QUuid>>>> componentVerticesSources;
     std::map<QString, QString> partMirrorIdMap;
+    std::map<QString, std::vector<std::pair<QVector3D, float>>> componentInflateBalls;
     void updateComponentCombinableMesh(QString componentId, void *mesh);
 };
 
@@ -78,8 +80,8 @@ private:
     void checkDirtyFlags();
     bool checkIsComponentDirty(QString componentId);
     bool checkIsPartDirty(QString partId);
-    void *combineComponentMesh(QString componentId, bool *inverse);
-    void *combinePartMesh(QString partId);
+    void *combineComponentMesh(QString componentId, CombineMode *combineMode, std::vector<std::pair<QVector3D, float>> *inflateBalls);
+    void *combinePartMesh(QString partId, std::vector<std::pair<QVector3D, float>> *balls=nullptr);
 };
 
 #endif
diff --git a/src/meshinflate.cpp b/src/meshinflate.cpp
new file mode 100644
index 00000000..1f540dc1
--- /dev/null
+++ b/src/meshinflate.cpp
@@ -0,0 +1,50 @@
+#include <QDebug>
+#include <set>
+#include "meshinflate.h"
+#include "meshutil.h"
+
+void *meshInflate(void *combinableMesh, const std::vector<std::pair<QVector3D, float>> &inflateBalls, std::vector<std::pair<QVector3D, QVector3D>> &inflatedVertices)
+{
+    std::vector<QVector3D> oldPositions;
+    std::vector<QVector3D> newPositions;
+    std::vector<std::vector<int>> faces;
+    std::set<int> changedVertices;
+    
+    loadCombinableMeshVerticesPositionsAndFacesIndices(combinableMesh, oldPositions, faces);
+    newPositions = oldPositions;
+    
+    std::vector<float> inflateBallRadius2s(inflateBalls.size());
+    for (size_t i = 0; i < inflateBalls.size(); ++i) {
+        const auto &radius = inflateBalls[i].second;
+        inflateBallRadius2s[i] = radius * radius;
+    }
+    
+    for (size_t i = 0; i < oldPositions.size(); ++i) {
+        const auto &oldPos = oldPositions[i];
+        QVector3D sumOfNewPos;
+        size_t pushedByBallNum = 0;
+        for (size_t j = 0; j < inflateBalls.size(); ++j) {
+            const auto &ball = inflateBalls[j];
+            const auto &ballPos = ball.first;
+            const auto &ballRadius = std::max(ball.second, (float)0.00001);
+            const auto ballToPosVec = oldPos - ballPos;
+            if (ballToPosVec.lengthSquared() > inflateBallRadius2s[j])
+                continue;
+            const auto distance = 1.0 - ballToPosVec.length() / ballRadius;
+            const auto smoothedDist = 3.0 * std::pow(distance, 2) - 2.0 * std::pow(distance, 3);
+            const auto newPosPushByBall = oldPos + ballToPosVec * smoothedDist;
+            sumOfNewPos += newPosPushByBall;
+            ++pushedByBallNum;
+        }
+        if (0 == pushedByBallNum)
+            continue;
+        newPositions[i] = sumOfNewPos / pushedByBallNum;
+        changedVertices.insert(i);
+    }
+    
+    for (const auto &index: changedVertices) {
+        inflatedVertices.push_back({oldPositions[index], newPositions[index]});
+    }
+    
+    return buildCombinableMeshFromVerticesPositionsAndFacesIndices(newPositions, faces);
+}
\ No newline at end of file
diff --git a/src/meshinflate.h b/src/meshinflate.h
new file mode 100644
index 00000000..9e901ed5
--- /dev/null
+++ b/src/meshinflate.h
@@ -0,0 +1,8 @@
+#ifndef DUST3D_MESH_INFLATE_H
+#define DUST3D_MESH_INFLATE_H
+#include <vector>
+#include <QVector3D>
+
+void *meshInflate(void *combinableMesh, const std::vector<std::pair<QVector3D, float>> &inflateBalls, std::vector<std::pair<QVector3D, QVector3D>> &inflatedVertices);
+
+#endif
diff --git a/src/meshutil.cpp b/src/meshutil.cpp
index 83194d28..6599fe40 100644
--- a/src/meshutil.cpp
+++ b/src/meshutil.cpp
@@ -52,6 +52,25 @@ void loadMeshVerticesPositions(void *meshliteContext, int meshId, std::vector<QV
     delete[] vertexPositions;
 }
 
+template <class Kernel>
+typename CGAL::Surface_mesh<typename Kernel::Point_3> *buildCgalMesh(const std::vector<QVector3D> &positions, const std::vector<std::vector<int>> &indices)
+{
+    typename CGAL::Surface_mesh<typename Kernel::Point_3> *mesh = new typename CGAL::Surface_mesh<typename Kernel::Point_3>;
+    std::map<int, typename CGAL::Surface_mesh<typename Kernel::Point_3>::Vertex_index> oldToNewMap;
+    for (int i = 0; i < (int)positions.size(); ++i) {
+        const auto &pos = positions[i];
+        oldToNewMap[i] = mesh->add_vertex(typename Kernel::Point_3(pos.x(), pos.y(), pos.z()));
+    }
+    for (const auto &face: indices) {
+        std::vector<typename CGAL::Surface_mesh<typename Kernel::Point_3>::Vertex_index> faceVertexIndices;
+        for (const auto &index: face) {
+            faceVertexIndices.push_back(oldToNewMap[index]);
+        }
+        mesh->add_face(faceVertexIndices);
+    }
+    return mesh;
+}
+
 template <class Kernel>
 typename CGAL::Surface_mesh<typename Kernel::Point_3> *makeCgalMeshFromMeshlite(void *meshlite, int meshId)
 {
@@ -458,3 +477,54 @@ void *convertToCombinableConvexHullMesh(void *meshliteContext, int meshId)
     ExactMesh *mesh = makeCgalConvexHullMeshFromMeshlite<ExactKernel>(meshliteContext, meshId);
     return (void *)mesh;
 }
+
+void loadCombinableMeshVerticesPositionsAndFacesIndices(void *mesh, std::vector<QVector3D> &positions, std::vector<std::vector<int>> &indices)
+{
+    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));
+    }
+    
+    typename CGAL::Surface_mesh<ExactKernel::Point_3>::Face_range faceRage = exactMesh->faces();
+    typename CGAL::Surface_mesh<ExactKernel::Point_3>::Face_range::iterator faceIt;
+    for (faceIt = faceRage.begin(); faceIt != faceRage.end(); faceIt++) {
+        CGAL::Vertex_around_face_iterator<typename CGAL::Surface_mesh<ExactKernel::Point_3>> vbegin, vend;
+        std::vector<int> faceIndices;
+        for (boost::tie(vbegin, vend) = CGAL::vertices_around_face(exactMesh->halfedge(*faceIt), *exactMesh);
+                vbegin != vend;
+                ++vbegin){
+            faceIndices.push_back(*vbegin);
+        }
+        indices.push_back(faceIndices);
+    }
+}
+
+void *buildCombinableMeshFromVerticesPositionsAndFacesIndices(const std::vector<QVector3D> &positions, const std::vector<std::vector<int>> &indices)
+{
+    ExactMesh *mesh = nullptr;
+    if (indices.empty())
+        return nullptr;
+    mesh = buildCgalMesh<ExactKernel>(positions, indices);
+    if (nullptr == mesh) {
+        return mesh;
+    }
+    if (CGAL::Polygon_mesh_processing::does_self_intersect(*mesh)) {
+        qDebug() << "CGAL::Polygon_mesh_processing::does_self_intersect";
+        delete mesh;
+        return nullptr;
+    }
+    return (void *)mesh;
+}
diff --git a/src/meshutil.h b/src/meshutil.h
index 82252f3b..7a144a2d 100644
--- a/src/meshutil.h
+++ b/src/meshutil.h
@@ -21,5 +21,7 @@ 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);
+void loadCombinableMeshVerticesPositionsAndFacesIndices(void *mesh, std::vector<QVector3D> &positions, std::vector<std::vector<int>> &indices);
+void *buildCombinableMeshFromVerticesPositionsAndFacesIndices(const std::vector<QVector3D> &positions, const std::vector<std::vector<int>> &indices);
 
 #endif
diff --git a/src/parttreewidget.cpp b/src/parttreewidget.cpp
index 6253f257..daa1afc9 100644
--- a/src/parttreewidget.cpp
+++ b/src/parttreewidget.cpp
@@ -6,6 +6,7 @@
 #include <QRadialGradient>
 #include <QBrush>
 #include <QGuiApplication>
+#include <QComboBox>
 #include "parttreewidget.h"
 #include "partwidget.h"
 #include "skeletongraphicswidget.h"
@@ -103,6 +104,11 @@ void PartTreeWidget::selectComponent(QUuid componentId, bool multiple)
     }
 }
 
+void PartTreeWidget::updateComponentAppearance(QUuid componentId)
+{
+    updateComponentSelectState(componentId, isComponentSelected(componentId));
+}
+
 void PartTreeWidget::updateComponentSelectState(QUuid componentId, bool selected)
 {
     const Component *component = m_document->findComponent(componentId);
@@ -114,19 +120,19 @@ void PartTreeWidget::updateComponentSelectState(QUuid componentId, bool selected
         auto item = m_partItemMap.find(component->linkToPartId);
         if (item != m_componentItemMap.end()) {
             PartWidget *widget = (PartWidget *)itemWidget(item->second, 0);
+            // Unnormal state updating call should be called before check state updating call
+            widget->updateUnnormalState(component->combineMode != CombineMode::Normal);
             widget->updateCheckedState(selected);
         }
         return;
     }
     auto item = m_componentItemMap.find(componentId);
     if (item != m_componentItemMap.end()) {
-        if (selected) {
-            item->second->setFont(0, m_selectedFont);
-            item->second->setForeground(0, QBrush(Theme::red));
-        } else {
-            item->second->setFont(0, m_normalFont);
-            item->second->setForeground(0, QBrush(Theme::white));
-        }
+        item->second->setFont(0, selected ? m_selectedFont : m_normalFont);
+        if (component->combineMode != CombineMode::Normal)
+            item->second->setForeground(0, selected ? QBrush(Theme::blue) : QBrush(Theme::blue));
+        else
+            item->second->setForeground(0, selected ? QBrush(Theme::red) : QBrush(Theme::white));
     }
 }
 
@@ -254,7 +260,7 @@ void PartTreeWidget::showContextMenu(const QPoint &pos)
     } else {
         QLabel *previewLabel = new QLabel;
         previewLabel->setFixedHeight(Theme::partPreviewImageSize);
-        previewLabel->setStyleSheet("QLabel {color: " + Theme::red.name() + "}");
+        previewLabel->setStyleSheet("QLabel {color: " + (component && (component->combineMode != CombineMode::Normal) ? Theme::blue.name() : Theme::red.name()) + "}");
         if (nullptr != component) {
             previewLabel->setText(component->name);
         } else if (!componentIds.empty()) {
@@ -263,7 +269,31 @@ void PartTreeWidget::showContextMenu(const QPoint &pos)
         layout->addWidget(previewLabel);
     }
     QWidget *widget = new QWidget;
-    widget->setLayout(layout);
+    if (nullptr != component) {
+        QComboBox *combineModeSelectBox = new QComboBox;
+        for (size_t i = 0; i < (size_t)CombineMode::Count; ++i) {
+            CombineMode mode = (CombineMode)i;
+            combineModeSelectBox->addItem(CombineModeToDispName(mode));
+        }
+        combineModeSelectBox->setCurrentIndex((int)component->combineMode);
+        
+        connect(combineModeSelectBox, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, [=](int index) {
+            emit setComponentCombineMode(component->id, (CombineMode)index);
+        });
+        
+        QHBoxLayout *combineModeLayout = new QHBoxLayout;
+        combineModeLayout->setAlignment(Qt::AlignCenter);
+        combineModeLayout->setContentsMargins(0, 0, 0, 0);
+        combineModeLayout->setSpacing(0);
+        combineModeLayout->addWidget(combineModeSelectBox);
+    
+        QVBoxLayout *newLayout = new QVBoxLayout;
+        newLayout->addLayout(layout);
+        newLayout->addLayout(combineModeLayout);
+        widget->setLayout(newLayout);
+    } else {
+        widget->setLayout(layout);
+    }
     forDisplayPartImage.setDefaultWidget(widget);
     if (!componentIds.empty()) {
         contextMenu.addAction(&forDisplayPartImage);
@@ -278,8 +308,6 @@ void PartTreeWidget::showContextMenu(const QPoint &pos)
     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);
     
     if (nullptr != component && nullptr != part) {
@@ -348,6 +376,7 @@ void PartTreeWidget::showContextMenu(const QPoint &pos)
         contextMenu.addAction(&unlockAction);
     }
     
+    /*
     if (component && !component->inverse) {
         connect(&invertAction, &QAction::triggered, [=]() {
             emit setComponentInverseState(component->id, true);
@@ -361,6 +390,7 @@ void PartTreeWidget::showContextMenu(const QPoint &pos)
         });
         contextMenu.addAction(&cancelInverseAction);
     }
+    */
     
     contextMenu.addSeparator();
     
@@ -650,6 +680,11 @@ void PartTreeWidget::componentExpandStateChanged(QUuid componentId)
     componentItem->second->setExpanded(component->expanded);
 }
 
+void PartTreeWidget::componentCombineModeChanged(QUuid componentId)
+{
+    updateComponentAppearance(componentId);
+}
+
 void PartTreeWidget::addComponentChildrenToItem(QUuid componentId, QTreeWidgetItem *parentItem)
 {
     const Component *parentComponent = m_document->findComponent(componentId);
diff --git a/src/parttreewidget.h b/src/parttreewidget.h
index 54fef091..7471b97a 100644
--- a/src/parttreewidget.h
+++ b/src/parttreewidget.h
@@ -33,7 +33,7 @@ signals:
     void unlockAllComponents();
     void setPartLockState(QUuid partId, bool locked);
     void setPartVisibleState(QUuid partId, bool visible);
-    void setComponentInverseState(QUuid componentId, bool inverse);
+    void setComponentCombineMode(QUuid componentId, CombineMode combineMode);
     void hideDescendantComponents(QUuid componentId);
     void showDescendantComponents(QUuid componentId);
     void lockDescendantComponents(QUuid componentId);
@@ -49,6 +49,7 @@ public slots:
     void componentRemoved(QUuid componentId);
     void componentAdded(QUuid componentId);
     void componentExpandStateChanged(QUuid componentId);
+    void componentCombineModeChanged(QUuid componentId);
     void partRemoved(QUuid partId);
     void partPreviewChanged(QUuid partid);
     void partLockStateChanged(QUuid partId);
@@ -77,6 +78,7 @@ private:
     void selectComponent(QUuid componentId, bool multiple=false);
     QWidget *createSmoothMenuWidget(QUuid componentId);
     void updateComponentSelectState(QUuid componentId, bool selected);
+    void updateComponentAppearance(QUuid componentId);
     bool isComponentSelected(QUuid componentId);
 private:
     const Document *m_document = nullptr;
diff --git a/src/partwidget.cpp b/src/partwidget.cpp
index 724239e2..b6a3e9f7 100644
--- a/src/partwidget.cpp
+++ b/src/partwidget.cpp
@@ -14,7 +14,8 @@
 
 PartWidget::PartWidget(const Document *document, QUuid partId) :
     m_document(document),
-    m_partId(partId)
+    m_partId(partId),
+    m_unnormal(false)
 {
     QSizePolicy retainSizePolicy = sizePolicy();
     retainSizePolicy.setRetainSizeWhenHidden(true);
@@ -262,11 +263,20 @@ void PartWidget::updateAllButtons()
 void PartWidget::updateCheckedState(bool checked)
 {
     if (checked)
-        m_backgroundWidget->setStyleSheet("QWidget#background {border: 1px solid " + Theme::red.name() + ";}");
+        m_backgroundWidget->setStyleSheet("QWidget#background {border: 1px solid " + (m_unnormal ? Theme::blue.name() : Theme::red.name()) + ";}");
     else
         m_backgroundWidget->setStyleSheet("QWidget#background {border: 1px solid transparent;}");
 }
 
+void PartWidget::updateUnnormalState(bool unnormal)
+{
+    if (m_unnormal == unnormal)
+        return;
+    
+    m_unnormal = unnormal;
+    updateAllButtons();
+}
+
 void PartWidget::mouseDoubleClickEvent(QMouseEvent *event)
 {
     QWidget::mouseDoubleClickEvent(event);
@@ -429,7 +439,7 @@ void PartWidget::initButton(QPushButton *button)
 
 void PartWidget::updateButton(QPushButton *button, QChar icon, bool highlighted)
 {
-    Theme::updateAwesomeMiniButton(button, icon, highlighted);
+    Theme::updateAwesomeMiniButton(button, icon, highlighted, m_unnormal);
 }
 
 void PartWidget::updatePreview()
diff --git a/src/partwidget.h b/src/partwidget.h
index 3641aa1c..f6b63609 100644
--- a/src/partwidget.h
+++ b/src/partwidget.h
@@ -45,6 +45,7 @@ public:
     void updateColorButton();
     void updateWrapButton();
     void updateCheckedState(bool checked);
+    void updateUnnormalState(bool unnormal);
     static QSize preferredSize();
     ModelWidget *previewWidget();
 protected:
@@ -55,6 +56,7 @@ public slots:
 private: // need initialize
     const Document *m_document;
     QUuid m_partId;
+    bool m_unnormal;
 private:
     ModelWidget *m_previewWidget;
     QPushButton *m_visibleButton;
diff --git a/src/skeletongraphicswidget.cpp b/src/skeletongraphicswidget.cpp
index 78201d31..59ea648c 100644
--- a/src/skeletongraphicswidget.cpp
+++ b/src/skeletongraphicswidget.cpp
@@ -588,17 +588,21 @@ void SkeletonGraphicsWidget::mouseMoveEvent(QMouseEvent *event)
     mouseMove(event);
 }
 
+bool SkeletonGraphicsWidget::inputWheelEventFromOtherWidget(QWheelEvent *event)
+{
+    if (!wheel(event)) {
+        if (m_modelWidget && m_modelWidget->inputWheelEventFromOtherWidget(event))
+            return true;
+    }
+    return true;
+}
+
 void SkeletonGraphicsWidget::wheelEvent(QWheelEvent *event)
 {
     if (!wheel(event)) {
         if (m_modelWidget && m_modelWidget->inputWheelEventFromOtherWidget(event))
             return;
     }
-    
-    //if (SkeletonDocumentEditMode::ZoomIn == m_document->editMode ||
-    //        SkeletonDocumentEditMode::ZoomOut == m_document->editMode ||
-    //        SkeletonDocumentEditMode::Drag == m_document->editMode)
-    //    QGraphicsView::wheelEvent(event);
 }
 
 void SkeletonGraphicsWidget::mouseReleaseEvent(QMouseEvent *event)
diff --git a/src/skeletongraphicswidget.h b/src/skeletongraphicswidget.h
index 38653eba..09fd2b92 100644
--- a/src/skeletongraphicswidget.h
+++ b/src/skeletongraphicswidget.h
@@ -410,6 +410,7 @@ public:
     bool hasTwoDisconnectedNodesSelection();
     void setModelWidget(ModelWidget *modelWidget);
     void setNodePositionModifyOnly(bool nodePositionModifyOnly);
+    bool inputWheelEventFromOtherWidget(QWheelEvent *event);
 protected:
     void mouseMoveEvent(QMouseEvent *event) override;
     void wheelEvent(QWheelEvent *event) override;
diff --git a/src/theme.cpp b/src/theme.cpp
index 7c21085b..9cd6d7b2 100644
--- a/src/theme.cpp
+++ b/src/theme.cpp
@@ -103,18 +103,28 @@ void Theme::initAwesomeMiniButton(QPushButton *button)
     button->setFocusPolicy(Qt::NoFocus);
 }
 
-void Theme::updateAwesomeMiniButton(QPushButton *button, QChar icon, bool highlighted)
+void Theme::updateAwesomeMiniButton(QPushButton *button, QChar icon, bool highlighted, bool unnormal)
 {
     button->setText(icon);
     QColor color;
-    if (highlighted)
-        color = QColor("#fc6621");
-    else
+    bool needDesaturation = true;
+    
+    if (highlighted) {
+        if (unnormal) {
+            color = Theme::blue;
+            needDesaturation = false;
+        } else {
+            color = Theme::red;
+        }
+    } else {
         color = QColor("#525252");
-
-    color = color.toHsv();
-    color.setHsv(color.hue(), color.saturation() / 5, color.value() * 2 / 3);
-    color = color.toRgb();
+    }
+    
+    if (needDesaturation) {
+        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() + ";}");
 }
diff --git a/src/theme.h b/src/theme.h
index 30351182..e0867f6c 100644
--- a/src/theme.h
+++ b/src/theme.h
@@ -47,7 +47,7 @@ public:
     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 updateAwesomeMiniButton(QPushButton *button, QChar icon, bool highlighted, bool unnormal=false);
     static void initAwesomeToolButton(QPushButton *button);
     static void initAwesomeToolButtonWithoutFont(QPushButton *button);
 };
diff --git a/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite_ffi.dll b/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite_ffi.dll
index 1c3971bf..0159aa38 100644
Binary files a/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite_ffi.dll and b/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite_ffi.dll differ
diff --git a/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite_ffi.dll.lib b/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite_ffi.dll.lib
index f5f923a5..96d506d2 100644
Binary files a/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite_ffi.dll.lib and b/thirdparty/meshlite/meshlite_unstable_vc14_x64/meshlite_ffi.dll.lib differ
diff --git a/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite_ffi.dll b/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite_ffi.dll
index 7bc81cc9..b21be9e9 100644
Binary files a/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite_ffi.dll and b/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite_ffi.dll differ
diff --git a/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite_ffi.dll.lib b/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite_ffi.dll.lib
index af531d81..7b6484f9 100644
Binary files a/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite_ffi.dll.lib and b/thirdparty/meshlite/meshlite_unstable_vc14_x86/meshlite_ffi.dll.lib differ