A method of processing three-dimensional content, comprising: parsing a level of detail, LoD, information of a bitstream containing three-dimensional, 3D, content that is represented as one geometry sub-bitstream and one or more attribute sub-bitstreams, wherein the parsing the LoD information comprises identifying a first syntax structure in the bitstream that includes multiple levels of details; generating, based on the LoD information, decoded information by decoding at least a portion of the geometry sub-bitstream and the one or more attribute sub-bitstreams corresponding to a desired level of detail; reconstructing, using the decoded information, a three-dimensional scene corresponding at least to the desired level of detail, wherein the bitstream conforms to a format organized according to multiple levels of details of the 3D content; and using a sample entry type field in the bitstream for determining whether the bitstream supports a spatial scalability functionality and for the identifying the first syntax structure, wherein the first syntax structure of the bitstream with multiple levels of details comprises: a first structure in which a complete set of levels of the bitstream is carried in one track with sub-sample structure; a second structure that includes an extractor with each level of the bitstream in the one track; and a third structure that includes one or more levels of the bitstream in the one track with redundant data from lower levels. parsing a level of detail, LoD, information of a bitstream containing three-dimensional, 3D, content that is represented as one geometry sub-bitstream and one or more attribute sub-bitstreams, wherein the parsing the LoD information comprises identifying a first syntax structure in the bitstream that includes multiple levels of details; generating, based on the LoD information, decoded information by decoding at least a portion of the geometry sub-bitstream and the one or more attribute sub-bitstreams corresponding to a desired level of detail; reconstructing, using the decoded information, a three-dimensional scene corresponding at least to the desired level of detail, wherein the bitstream conforms to a format organized according to multiple levels of details of the 3D content; and using a sample entry type field in the bitstream for determining whether the bitstream supports a spatial scalability functionality and for the identifying the first syntax structure, wherein the first syntax structure of the bitstream with multiple levels of details comprises: a first structure in which a complete set of levels of the bitstream is carried in one track with sub-sample structure; a second structure that includes an extractor with each level of the bitstream in the one track; and a third structure that includes one or more levels of the bitstream in the one track with redundant data from lower levels. a first structure in which a complete set of levels of the bitstream is carried in one track with sub-sample structure; a second structure that includes an extractor with each level of the bitstream in the one track; and a third structure that includes one or more levels of the bitstream in the one track with redundant data from lower levels. <EOS>