As shown in FIG. 4, the untimed media and complexity representation 400 includes scene information 401. The scene information 401 is not associated with a start and end time/duration (according to a clock, a timer, or the like). An untimed scene manifest (not depicted) may references a Scene 1.0 for which there is no other scene that can branch to Scene 1.0. The scene information 401 refers to a list of components 402 that separately describe processing information and types of media assets that make up the scene information 401. The components 402 refer to visual assets, audio assets, haptic assets, and timed assets (collectively referred to as assets 403). The assets 403 further refer to a base layer 404 and attribute enhancement layers 405 and 406. In this exemplary embodiment, each of the base layer 404 refer to a numeric frequency value that indicates the number of times the asset is used across the set of scenes that comprise the presentation. The scene information 401 may also refer to other untimed scenes (i.e., referenced as untimed scenes 2.1-2.4 in FIG. 4) that are for an untimed media sources and/or scene information 407 that are for a timed media scene (i.e., referenced as timed scene 3.0 in FIG. 4). In the example of FIG. 4, the untimed immersive media contains a set of five scenes (including both timed and untimed). Lists of unique assets 408 identify unique assets associated with a particular scene that have not been previously used in higher order (e.g., parent) scenes. The list of unique assets 408 shown in FIG. 4 include unique assets for an untimed scene 2.3.
