I have created HDA in which Terrain Geometry is split using pack node to create split instances inside Unreal. Now I want to create a material instance of master material and apply different texture to terrain pieces that I have created inside unreal. I am trying to use Attribute name “unreal_material_instance” and “unreal_material_parameter_” but HDA inside unreal is not creating material instance and using master material instead.
Please let me know what steps m missing in this.

Thanks,