I'm new to Blender and UE4, but my goal is to create a mesh in Unreal Engine that I can assign two different materials to. For example, I would unwrap three faces of a cube, assign that to the default UV map in Blender. Then create another UV map in Blender on that object and unwrap the other three faces and assign them to the second UV map I created.
Once this is done I would import the .fbx into UE4 and then be able to drag & drop two unique materials on to the cube mesh object, and each material in UE4 would only be assigned to 3 of the cube faces.
The problem I am facing is how do I "assign" the three unwrapped faces to a particular UV channel?
Is this the right way to do this?