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diff --git a/src/runtimerender/Qt3DSRenderMaterialHelpers.h b/src/runtimerender/Qt3DSRenderMaterialHelpers.h
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+/****************************************************************************
+**
+** Copyright (C) 2008-2012 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#pragma once
+#ifndef QT3DS_RENDER_MATERIAL_HELPERS_H
+#define QT3DS_RENDER_MATERIAL_HELPERS_H
+#include "Qt3DSRenderCustomMaterial.h"
+#include "Qt3DSRenderDefaultMaterial.h"
+#include "Qt3DSRenderReferencedMaterial.h"
+
+namespace qt3ds {
+namespace render {
+
+    inline bool IsMaterial(SGraphObject &obj)
+    {
+        return obj.m_Type == GraphObjectTypes::CustomMaterial
+            || obj.m_Type == GraphObjectTypes::DefaultMaterial
+            || obj.m_Type == GraphObjectTypes::ReferencedMaterial;
+    }
+
+    inline bool IsMaterial(SGraphObject *obj)
+    {
+        if (obj)
+            return IsMaterial(*obj);
+        return false;
+    }
+
+    inline bool IsImage(SGraphObject &obj) { return obj.m_Type == GraphObjectTypes::Image; }
+
+    inline bool IsImage(SGraphObject *obj)
+    {
+        if (obj)
+            return IsImage(*obj);
+        return false;
+    }
+
+    inline SGraphObject *GetNextMaterialSibling(SGraphObject *obj)
+    {
+        if (obj == NULL)
+            return NULL;
+        if (IsMaterial(obj) == false) {
+            QT3DS_ASSERT(false);
+            return NULL;
+        }
+        if (obj->m_Type == GraphObjectTypes::CustomMaterial)
+            return static_cast<SCustomMaterial *>(obj)->m_NextSibling;
+        else if (obj->m_Type == GraphObjectTypes::DefaultMaterial)
+            return static_cast<SDefaultMaterial *>(obj)->m_NextSibling;
+        else
+            return static_cast<SReferencedMaterial *>(obj)->m_NextSibling;
+    }
+
+    inline void SetNextMaterialSibling(SGraphObject &obj, SGraphObject *sibling)
+    {
+        if (IsMaterial(obj) == false) {
+            QT3DS_ASSERT(false);
+            return;
+        }
+        if (obj.m_Type == GraphObjectTypes::CustomMaterial)
+            static_cast<SCustomMaterial *>(&obj)->m_NextSibling = sibling;
+        else if (obj.m_Type == GraphObjectTypes::DefaultMaterial)
+            static_cast<SDefaultMaterial *>(&obj)->m_NextSibling = sibling;
+        else
+            static_cast<SReferencedMaterial *>(&obj)->m_NextSibling = sibling;
+    }
+}
+}
+#endif