<http://schema.org/image>
<http://static1.squarespace.com/static/52a96550e4b02085b01b0346/t/54ff7cefe4b03d3ffb363924/1476026486769/>
<http://www.themantissa.net/blog/2013/12/18/optimizing-vray-for-maximum-render-speed-quality>