Sorry, I've been busy at work. MrR. I've never really found any really good free HDRI's. You can try turbosquid. They have at least one decent one for free that I've used before. Other than that, you may have to buy a CD's worth. Clopper. Here's the glass network. Unfortunately, I don't have time to cover the displacement map right now, but if I get time at the weekend, I can cover it then.