If you provide more context (game, software, purpose, where you saw the phrase), I can give you a precise and helpful answer.
Using a mobile device as a controller for high-end 3D environments, such as the Live Link VCAM for Unreal Engine vcam tweak exclusive
allows the user to output two distinct layers simultaneously over a single video track. It uses lightweight local AI to isolate the user's webcam feed (Subject) and allows a transparent overlay onto a Screen Capture source, effectively making the user a "holographic" overlay on top of their presentation. If you provide more context (game, software, purpose,