I exported my textures using the UE4 package in substance painter and I deactivated RGB’s when importing my roughness/metallic map in UE4 but I still can’t get the part of my object that are metallic to look metallic.
Looking at the URL of your linked images I guess you have not switched to the correct Metallic/Roughness shader when setting up your project in substance painter.
Hey you should put a specular output in Painter in your roughness/metallic map. My output settings in Painter are:
Channel R: metallic
Channel G: roughness
Channel B: specular
Than take the map in UE and deactivate RGBs…after this step you should have a green overlayed map.
All information of the individual channels should be black and white.