Neither do I, i’m just trying to achieve the result on a regular plan of glass…
found this scene that lends itself well
i downloaded that scene, but the frosted glass isn’t great. From far away it’s ok, but when you get closer you have the same issues we’re talking about.
two tests done on the fly to see how my glass material behaves in this scene.
I notice problems with the curved sides of the glass–I don’t know if dependent on the material, the scene, or the settings (I just changed the glass material).
Damn son, that some heavy snowflakes 
Sparkle glass 
in summary this material still needs improvement but it is still better than 2.2
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