Occlusion effect on ARKit

We created the effect of realistic immersion in augmented reality in one of our cases using the ARKit3 platform. We managed to turn an ordinary mobile device into a "camera with a chroma key", but without using it. If a person appears in the camera lens in front of digital content, his figure overlaps virtual objects, as it would happen in real life!
This approach turned the 3D scene into a real photo zone for the guests of the event.