Thanks a million Jeff! I took a look at the example and first of all, it works perfectly! The code looks practically the same, although here and there some GLSL uniforms have been changed to Vizard uniforms. I only found a couple of Vizard uniforms here (
http://docs.worldviz.com/vizard/Shaders_basics.htm), but I'm guessing there are a quite some more?
Anyway, a big thanks
Going to move on to my water shader and HDR implementation. This will surely help my scene get that extra pop! Thanks again.