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diff --git a/res/effectlib/customMaterialFragBodyAO.glsllib b/res/effectlib/customMaterialFragBodyAO.glsllib
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+/****************************************************************************
+**
+** Copyright (C) 2014 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef CUSTOM_MATERIAL_FRAG_BODY_AO_GLSLLIB
+#define CUSTOM_MATERIAL_FRAG_BODY_AO_GLSLLIB
+
+  bool twoSided = false;
+  vec3 materialEmissive = vec3( 0.0, 0.0, 0.0 );
+
+  float materialIOR = computeIOR();
+
+  if ( gl_FrontFacing )
+  {
+    materialEmissive = computeFrontMaterialEmissive() * computeMaterialEmissiveMask();
+  }
+  else
+  {
+    materialIOR = 1.0 / materialIOR;
+    twoSided = evalTwoSided();
+    if ( twoSided )
+    {
+      normal = -normal;
+      materialEmissive = computeBackMaterialEmissive() * computeMaterialEmissiveMask();
+    }
+  }
+
+  vec4 rgba = vec4( materialEmissive, 0.0 );
+
+  // compute ambient occlusion
+  float aoFactor = customMaterialAO( );
+
+  vec3 lightAmbient, lightDiffuse, lightSpecular, L;
+  for ( int i=0 ; i<uNumLights ; i++ )
+  {
+    sampleLight( lights[i], varWorldPos, L, lightAmbient, lightDiffuse, lightSpecular);
+    lightAmbient *= aoFactor;
+    lightDiffuse *= aoFactor;
+
+    //evalTemporariesPerLightSource( normal, L, lightDiffuse, lightSpecular, materialIOR );
+    if (gl_FrontFacing)
+      computeFrontLayerColor( normal, L, viewDir, lightDiffuse, lightSpecular, materialIOR, aoFactor );
+    else
+      computeBackLayerColor( normal, L, viewDir, lightDiffuse, lightSpecular, materialIOR, aoFactor );
+  }
+  for ( int i=0 ; i < uNumAreaLights; ++i )
+  {
+    if (gl_FrontFacing)
+      computeFrontAreaColor( i, arealights[i].diffuse, arealights[i].specular );
+    else
+      computeBackAreaColor( i, arealights[i].diffuse, arealights[i].specular );
+  }
+
+  if ( 0.0 < alpha )
+  {
+    if (gl_FrontFacing)
+      computeFrontLayerEnvironment( normal, viewDir, aoFactor );
+    else
+      computeBackLayerEnvironment( normal, viewDir, aoFactor );
+  }
+
+  rgba += computeLayerWeights( alpha );
+
+#endif