diff --git a/application/application.pro b/application/application.pro
index d68cfe57..58c79bd8 100644
--- a/application/application.pro
+++ b/application/application.pro
@@ -95,6 +95,8 @@ include(third_party/QtAwesome/QtAwesome/QtAwesome.pri)
 
 HEADERS += sources/about_widget.h
 SOURCES += sources/about_widget.cc
+HEADERS += sources/bone_generator.h
+SOURCES += sources/bone_generator.cc
 HEADERS += sources/bone_list_model.h
 SOURCES += sources/bone_list_model.cc
 HEADERS += sources/bone_manage_widget.h
@@ -310,8 +312,8 @@ HEADERS += ../dust3d/mesh/tube_mesh_builder.h
 SOURCES += ../dust3d/mesh/tube_mesh_builder.cc
 HEADERS += ../dust3d/mesh/weld_vertices.h
 SOURCES += ../dust3d/mesh/weld_vertices.cc
-HEADERS += ../dust3d/rig/skeleton_generator.h
-SOURCES += ../dust3d/rig/skeleton_generator.cc
+HEADERS += ../dust3d/rig/bone_generator.h
+SOURCES += ../dust3d/rig/bone_generator.cc
 HEADERS += ../dust3d/uv/chart_packer.h
 SOURCES += ../dust3d/uv/chart_packer.cc
 HEADERS += ../dust3d/uv/max_rectangles.h
diff --git a/application/sources/bone_generator.cc b/application/sources/bone_generator.cc
new file mode 100644
index 00000000..2ad920f9
--- /dev/null
+++ b/application/sources/bone_generator.cc
@@ -0,0 +1,35 @@
+#include "bone_generator.h"
+#include <dust3d/mesh/smooth_normal.h>
+#include <dust3d/mesh/trim_vertices.h>
+
+void BoneGenerator::process()
+{
+    generate();
+
+    m_bonePreviewMeshes = std::make_unique<std::map<dust3d::Uuid, std::unique_ptr<ModelMesh>>>();
+    for (auto& it : bonePreviews()) {
+        dust3d::trimVertices(&it.second.vertices, true);
+        for (auto& it : it.second.vertices) {
+            it *= 2.0;
+        }
+        std::vector<dust3d::Vector3> previewTriangleNormals;
+        previewTriangleNormals.reserve(it.second.triangles.size());
+        for (const auto& face : it.second.triangles) {
+            previewTriangleNormals.emplace_back(dust3d::Vector3::normal(
+                it.second.vertices[face[0]],
+                it.second.vertices[face[1]],
+                it.second.vertices[face[2]]));
+        }
+        std::vector<std::vector<dust3d::Vector3>> previewTriangleVertexNormals;
+        dust3d::smoothNormal(it.second.vertices,
+            it.second.triangles,
+            previewTriangleNormals,
+            0,
+            &previewTriangleVertexNormals);
+        (*m_bonePreviewMeshes)[it.first] = std::make_unique<ModelMesh>(it.second.vertices,
+            it.second.triangles,
+            previewTriangleVertexNormals);
+    }
+
+    emit finished();
+}
diff --git a/application/sources/bone_generator.h b/application/sources/bone_generator.h
new file mode 100644
index 00000000..324b4076
--- /dev/null
+++ b/application/sources/bone_generator.h
@@ -0,0 +1,20 @@
+#ifndef DUST3D_APPLICATION_BONE_GENERATOR_H_
+#define DUST3D_APPLICATION_BONE_GENERATOR_H_
+
+#include "model_mesh.h"
+#include <QObject>
+#include <dust3d/rig/bone_generator.h>
+#include <memory>
+
+class BoneGenerator : public QObject, public dust3d::BoneGenerator {
+    Q_OBJECT
+public slots:
+    void process();
+signals:
+    void finished();
+
+private:
+    std::unique_ptr<std::map<dust3d::Uuid, std::unique_ptr<ModelMesh>>> m_bonePreviewMeshes;
+};
+
+#endif
diff --git a/dust3d/rig/skeleton_generator.cc b/dust3d/rig/bone_generator.cc
similarity index 84%
rename from dust3d/rig/skeleton_generator.cc
rename to dust3d/rig/bone_generator.cc
index 58c4251a..4730e991 100644
--- a/dust3d/rig/skeleton_generator.cc
+++ b/dust3d/rig/bone_generator.cc
@@ -20,46 +20,46 @@
  *  SOFTWARE.
  */
 
-#include <dust3d/rig/skeleton_generator.h>
+#include <dust3d/rig/bone_generator.h>
 #include <unordered_map>
 
 namespace dust3d {
 
-SkeletonGenerator::SkeletonGenerator()
+BoneGenerator::BoneGenerator()
 {
 }
 
-void SkeletonGenerator::setVertices(const std::vector<Vector3>& vertices)
+void BoneGenerator::setVertices(const std::vector<Vector3>& vertices)
 {
     m_vertices = vertices;
 }
 
-void SkeletonGenerator::setTriangles(const std::vector<std::vector<size_t>>& triangles)
+void BoneGenerator::setTriangles(const std::vector<std::vector<size_t>>& triangles)
 {
     m_triangles = triangles;
 }
 
-void SkeletonGenerator::setPositionToNodeMap(const std::map<PositionKey, Uuid>& positionToNodeMap)
+void BoneGenerator::setPositionToNodeMap(const std::map<PositionKey, Uuid>& positionToNodeMap)
 {
     m_positionToNodeMap = positionToNodeMap;
 }
 
-void SkeletonGenerator::addBone(const Uuid& boneId, const Bone& bone)
+void BoneGenerator::addBone(const Uuid& boneId, const Bone& bone)
 {
     m_boneMap.emplace(std::make_pair(boneId, bone));
 }
 
-void SkeletonGenerator::addNode(const Uuid& nodeId, const Node& node)
+void BoneGenerator::addNode(const Uuid& nodeId, const Node& node)
 {
     m_nodeMap.emplace(std::make_pair(nodeId, node));
 }
 
-void SkeletonGenerator::addNodeBinding(const Uuid& nodeId, const NodeBinding& nodeBinding)
+void BoneGenerator::addNodeBinding(const Uuid& nodeId, const NodeBinding& nodeBinding)
 {
     m_nodeBindingMap.emplace(std::make_pair(nodeId, nodeBinding));
 }
 
-void SkeletonGenerator::buildEdges()
+void BoneGenerator::buildEdges()
 {
     for (const auto& triangle : m_triangles) {
         for (size_t i = 0; i < 3; ++i) {
@@ -70,7 +70,7 @@ void SkeletonGenerator::buildEdges()
     }
 }
 
-Uuid SkeletonGenerator::resolveVertexSourceByBreadthFirstSearch(size_t vertexIndex, std::unordered_set<size_t>& visited)
+Uuid BoneGenerator::resolveVertexSourceByBreadthFirstSearch(size_t vertexIndex, std::unordered_set<size_t>& visited)
 {
     visited.insert(vertexIndex);
     auto findNeighbors = m_edges.find(vertexIndex);
@@ -90,7 +90,7 @@ Uuid SkeletonGenerator::resolveVertexSourceByBreadthFirstSearch(size_t vertexInd
     return Uuid();
 }
 
-void SkeletonGenerator::resolveVertexSources()
+void BoneGenerator::resolveVertexSources()
 {
     m_vertexSourceNodes.resize(m_vertices.size());
     for (size_t i = 0; i < m_vertices.size(); ++i) {
@@ -108,7 +108,7 @@ void SkeletonGenerator::resolveVertexSources()
     }
 }
 
-void SkeletonGenerator::buildBoneJoints()
+void BoneGenerator::buildBoneJoints()
 {
     for (auto& boneIt : m_boneMap) {
         boneIt.second.startPositions.resize(boneIt.second.joints.size());
@@ -126,12 +126,12 @@ void SkeletonGenerator::buildBoneJoints()
     }
 }
 
-void SkeletonGenerator::assignVerticesToBoneJoints()
+void BoneGenerator::assignVerticesToBoneJoints()
 {
     // TODO:
 }
 
-void SkeletonGenerator::groupBoneVertices()
+void BoneGenerator::groupBoneVertices()
 {
     for (size_t i = 0; i < m_vertexSourceNodes.size(); ++i) {
         const Uuid& sourceNodeId = m_vertexSourceNodes[i];
@@ -146,7 +146,7 @@ void SkeletonGenerator::groupBoneVertices()
     }
 }
 
-void SkeletonGenerator::generate()
+void BoneGenerator::generate()
 {
     buildEdges();
     resolveVertexSources();
@@ -156,7 +156,12 @@ void SkeletonGenerator::generate()
     generateBonePreviews();
 }
 
-void SkeletonGenerator::generateBonePreviews()
+std::map<Uuid, BoneGenerator::BonePreview>& BoneGenerator::bonePreviews()
+{
+    return m_bonePreviews;
+}
+
+void BoneGenerator::generateBonePreviews()
 {
     for (const auto& it : m_boneVertices) {
         BonePreview bonePreview;
diff --git a/dust3d/rig/skeleton_generator.h b/dust3d/rig/bone_generator.h
similarity index 95%
rename from dust3d/rig/skeleton_generator.h
rename to dust3d/rig/bone_generator.h
index cb8af3d9..6d9591fb 100644
--- a/dust3d/rig/skeleton_generator.h
+++ b/dust3d/rig/bone_generator.h
@@ -20,8 +20,8 @@
  *  SOFTWARE.
  */
 
-#ifndef DUST3D_RIG_SKELETON_GENERATOR_H_
-#define DUST3D_RIG_SKELETON_GENERATOR_H_
+#ifndef DUST3D_RIG_BONE_GENERATOR_H_
+#define DUST3D_RIG_BONE_GENERATOR_H_
 
 #include <array>
 #include <dust3d/base/color.h>
@@ -35,7 +35,7 @@
 
 namespace dust3d {
 
-class SkeletonGenerator {
+class BoneGenerator {
 public:
     struct NodeBinding {
         std::set<Uuid> boneIds;
@@ -63,7 +63,7 @@ public:
         std::vector<std::vector<size_t>> triangles;
     };
 
-    SkeletonGenerator();
+    BoneGenerator();
     void setVertices(const std::vector<Vector3>& vertices);
     void setTriangles(const std::vector<std::vector<size_t>>& triangles);
     void setPositionToNodeMap(const std::map<PositionKey, Uuid>& positionToNodeMap);
@@ -71,6 +71,7 @@ public:
     void addNodeBinding(const Uuid& nodeId, const NodeBinding& nodeBidning);
     void addNode(const Uuid& nodeId, const Node& node);
     void generate();
+    std::map<Uuid, BonePreview>& bonePreviews();
 
 private:
     std::vector<Vector3> m_vertices;