Apple patents 3D video calls where people stay inside a fixed frame

1. A computer system configured to communicate with one or more display generation components, comprising: one or more processors; and memory storing one or more programs configured to be executed by the one or more processors, the one or more programs including instructions for: displaying, via the one or more display generation components and within a three-dimensional environment, a real-time communication user interface that corresponds to a real-time communication session between a user of the computer system and one or more participants in the real-time communication session different from the user of the computer system, wherein displaying the real-time communication user interface includes displaying a first spatially-constrained representation of a first participant of the one or more participants in the real-time communication session, wherein the first spatially-constrained representation of the first participant includes: a first portal; and a first three-dimensional representation of the first participant that is displayed within the first portal, and while displaying the real-time communication user interface, including the first spatially-constrained representation of the first participant, receiving an indication of detected movement by the first participant; in response to receiving the indication of detected movement by the first participant, displaying, via the one or more display generation components, movement of the first three-dimensional representation within the first portal; and while displaying the first spatially-constrained representation of the first participant, changing a visual appearance of the first three-dimensional representation of the first participant based on a determination that a first portion of the first three-dimensional representation is approaching a boundary of the first portal.