You need to really mess with things such as the refraction index, and the "fade out" color and "murkiness" slider, not to mention the "turn reflective with angle" settings, all under the transparency tab in the material editor. I don't really like any of Vue's stock glass materials that much, though the refraction index settings are correct in relation to reality. Meaning, for example, typical air has a refraction index of 1.0, glass, 1.52, etc. All that can be changed though. Just play around with it all. Vue's material editor is very powerful. And you also might want to select "object Standard" for your mapping, or your materials might change as you move the objects.