I'm trying to upload a pair of glasses to FaceRig as a prop for my avatar:

https://sta.sh/013qfcayh2e3

The glass is its own material, set to metal and cloth. If I switch the Blending mode to Alpha Blend and make the texture semitransparent in Photoshop, it simply makes the glass look desaturated, like so:

https://sta.sh/0rwe53bk3c7

And if I set it to Alpha test, FaceRig just crashes upon reloading the prop.

The included documentation seems to be written for people who already know the majority of this information, and is overall not very helpful in knowing exactly what to do in order to get transparency working if you're coming in without a background in modeling, texturing and shaders.

I've even seen a tutorial in the Guides section here on Steam that walks through adding a prop to FaceRig, specifically a pair of glasses with transparent glass lenses, but mentions nothing about how to actually set up the transparency.

If anyone knows how to set this up, I'd really appreciate the assistance. All I really need to know are what settings to use in the Import Wizard, and how to prepare my texture.