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How to Build an AR Face Swap App in 15 Minutes or Less

Can’t wait for a sequel for Nicolas Cage And John Travolta’s Face/Off movie? Then create your own simple augmented reality (AR) face swapping demo application with Unity, AR Foundation, and echoAR! The full demo can also be found on echoAR’s GitHub.

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Don’t have an API key? Make sure to register for FREE at echoAR.

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  • Create a new Unity project.
  • Clone the Unity-ARFoundation-echoAR sample code.
  • Open the sample scene under AR Foundation\Scenes\FaceTracking\FaceMesh.unity.
  • Set the API key in the echoAR.cs script inside the echoAR\echoAR.prefab using the the Inspector.
  • Add an image hologram by uploading one of the face-#.jpg files from the assets folder to the console.
  • Overwrite the existing echoAR/CustomBehaviour.cs script with the new CustomBehaviour.cs file.

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Build & Run

  • Build and run the AR application. Verify that the AR Foundation\Scenes\FaceTracking\FaceMesh scene is ticked in the Scenes in Build list and click Build And Run.

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Learn more
Refer to our documentation to learn more about how to use Unity and echoAR.

Feel free to reach out at or join our support channel on Slack.

echoAR (; Techstars ’19) is a cloud platform for augmented reality (AR) and virtual reality (VR) that provides tools and server-side infrastructure to help developers & companies quickly build and deploy AR/VR apps and experiences.

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