This isn't really a hEngine thing more like FBX pipe thing, but I'm not sure where to put the question.
For various reasons I can't use hEngine, i need to get a model with shader data into unreal. I haven't got abc to work, so I'm using fbx. All primitives have a shader path, but when I import into unreal, there is just the default shader and not a list of all the different shaders.
The Principled shader doesn't appear to carry over to UE4 via fbx, when I changed the shader to a default plastic shop all material groups were imported properly.