On Cluster, users can enjoy using avatars that they have modeled themselves, which is referred to as custom avatars. If you do not have a custom avatar, you can choose between the 5 default official avatars or your AvatarMaker avatar to enter worlds and events.
Custom avatars conform to a file format called VRM. To edit files of this format, you can use UniVRM, which is provided along with VRM. By using components provided by UniVRM, you can attach movements to your avatars that make them more expressive.