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Metalness Maps- Whats going on here?

Hi guys,

Anyone else noticing that the metalness maps still look pretty dull?  Below you can see an example of what I'm talking about.

The one on the left has the metalness set to black or a value of zero.  The one on the right has the metalness set to white, or a value of one.  It doesn't seem to be changing from a dialectic looking shader.  If anything, its diffusing out the specular highlight. 

I was told by Jason that the material just had to have a color to it in order to see a difference, but that doesn't seem to be the case.   I double checked on upload and the maps ARE going into the correct slots.  I've rendered the scene with preview GI as well.

Here's the same setup recreated inside of UE4:

As you can see, the metalness no longer has that dialectic feel to it, but its very obviously metal.  Has anyone solved this?

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