For the correct texture mapping, set free plugins SIGER: http://www.sigerstudio.eu/shop/plugins-free/sigertexmap-complexfresnel/  http://www.sigerstudio.eu/shop/plugins-free/sigertexmaps-sigernoise/  http : //www.sigerstudio.eu/shop/plugins-free/sigertexmaps-sigerscratches/ http://www.sigerstudio.eu/shop/plugins-free/sigertexmap-thinfilm/