boundaries of a motion-constrained set of tiles or slices are to be treated like picture boundaries. Such an indication may be present in the syntax or such an indication may be allowed to be indicated to be valid only when a motion-constrained set of tiles or slices fulfils certain constraints, such as but not necessarily limited to being of the same rectangular shape and the same size throughout a coded video sequence, and either being on the same spatial location within the pictures of the coded video sequence or a reorder indication indicating that tiles or slices can be reordered without affecting decodability for each of the tiles or slices. Treating boundaries of a motion-constrained set of tiles or slices as picture boundaries may include but is not necessarily limited to one or more of the following: saturating sample locations referenced in inter prediction to be within the motion-constrained set; treating, e.g. in various prediction processes, references to syntax elements and derived variables (e.g. motion vectors) of blocks outside the motion-constrained set of tiles or slices as references to unavailable data. Such treatment of boundaries of a motion-constrained set of tiles or slices effectively enables motion vectors to reference sample locations over the boundaries, where the sample value at the boundary is used as the sample values for the referenced sample locations over the boundaries. In some embodiments, the indication of an IPPE set also includes a dependency forest or graph which indicates one or more tiles that are not in-picture predicted from other tiles and prediction dependencies to the other tiles of the same IPPE tile set. [00184] In some embodiments, an anchor position for intra block copy motion vectors of a dependent tile in an IPPE tile set is indicated or inferred to be relative to an identified reference tile in the same IPPE tile set. In some embodiments, the anchor position may be applied if the current picture is the selected reference picture (e.g., when intra block copy is in use), and not applied otherwise. Tile identifiers as previously described may be used for indicating the anchor position. [00185] In example embodiments for coding plenoptic (a.k.a. dense lightfield) or multiview videos, a plenoptic image or pictures from all views of one time instance are encoded as one coded picture, one tile or tile set per sub-aperture image or one view. Furthermore, in-picture prediction may be enabled between selected tiles or tile sets. An encoder indicates IPPE tile sets, e.g., for each “leaf’ tile or tile set from which no other tile or tile set is predicted. [00186] In example embodiments involving patch-based video, such as for video coding of projected point clouds, the apparatus 10, such as the processing circuitry 12, may encode patches of different types (e.g., texture, depth, second-layer texture, second-layer depth, reflectance, etc.) as one coded picture in a manner that one or more entire patches form a tile