Unity Reflect makes it easy to bring multiple BIM models with all their metadata to real-time 3D and maintain a live link between them. You can also create your own real-time BIM applications and customize the user experience by building on top of Unity Reflect with Unity Pro.
Learn more about Unity Reflect: https://on.unity.com/39XGaie
Watch a webinar on how AEC firms use Unity Reflect: https://on.unity.com/35Dswxq
Source