Pool water process different in vray 2.0?

[jackdicker]

Hi guys,

 

To start, I have been using vray for about 8 months now and pool water was one of first hurdles I faced, I used a tutorial created by Fernando on YouTube that gives you a step by step guide of how to create pool water with caustics.

 

I have recently bought the new Vray 2.0 and followed these exact steps I have had been following for months, but it appears that the transparency/fog has just not worked..

 

can anyone see what I am not doing correctly?

 

Here are photos of my material showing just a reflective bitmap, and Fernando's material showing transparent fog.

 

the youtube tutorial is here, this is what I have followed for months.