In some embodiments, a computer system receives data representing a pose of at least a first portion of a user and causes presentation of an avatar that includes a respective avatar feature corresponding to the first portion of the user and presented having a variable display characteristic that is indicative of a certainty of the pose of the first portion of the user. In some embodiments, a computer system receives data indicating current activity of one or more users is activity of a first type and, in response, updates a representation of a user having a first appearance based on a first appearance template. The system receives second data indicating current activity of the one or more users and, in response, updates the appearance of the representation of the first user based on the current activity of the one or more users using the first or a second appearance template.