Building a dynamic smart city digital twin: From real-world data to immersive simulation in Unity

Learn how Unity powers dynamic Smart City Digital Twin development by combining real-time sensor data, AI-generated 3D models, and immersive simulations. Explore demonstrations including: how Unity enables 3D asset modification, geometric transformations, traffic simulation, and how Unity’s WebGL rendering enables browser-based navigation of the digital twin.

In this presentation, Rahul Tomar, Co-founder and Executive Director of Digital Twin Technology GmbH, and Leonel Toledo, Senior Researcher at the i2cat Foundation, discuss:

- Why digital twins are important now

- Didymos-XR, a European Union funded project for creating a digital twin of a city

- How they used Unity tech to build Didymos-XR, addressing challenges such as dynamic city loading, real-time data syncing, scalable analytics, and user interactivity

- Deep dive into the VR Tourism application created with Didymos-XR for Vilanova i la Geltru, a city in Catalonia

- Holoportation experience created with HoloMIT SDK

Check out the video for the full presentation.

This session was recorded at the Unite Conference in Barcelona, November, 2025.