Problem with alpha channel

I’ve Imported model and texture from blender, trying to use alpha channel as metallic/roughness but alpha=0 messes up rest of colors. Blender color:

blender alpha:

imported in UE4, glitchy:

texture:

preview:

material setup:

Seems like you are trying to use a .png, try .tga instead.

Thats the only thing I can guess looking at your images.

That worked, thanks!