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Glass shader with roughness variation

Hi y’all, I’m quite new to UE4 and am trying to create a rainy glass material with a foggy kind of effect. I’ve already created the textures in Substance Painter.

I looked at a few discussion on frosty glass and it seems that UE4 doens’t work with that very well; the only one that included using a map for “frostiness” was this one on ArtStation but I can’t seem to replicate that effect with the screenshot of the blueprint.

Any help would be greatly appreciated!