Refraction Not Visible

So Im trying to accomplish a cloaking effect in my material, but Its not visible when I apply it to an object in my level.

Hi masterburgler -

Can you check your Engine Scalability Settings under the Settings Icon in the Main Toolbar? It must be set to higher than Medium in order to render refraction correctly. If that does not work for you let me know, but your setup above is working correctly for me.

Thank You

Eric Ketchum