The expanding considerations of intangible as well as tangible cultural heritage, and memory twins along with digital twins, has extraordinary potential for adding more human aspects to digital heritage, if we can find ways to express it in a common and supported framework. In a related way, the IIIF (International Image Interoperability Framework) [1] provides a vital model for a communal approach to successfully developing and adopting a framework for pairing essential data and metadata, shared via documented APIs and expressed within a clearly-specified manifest, a document structured in a JSON-LD file. Similarly structured documentation for essential paradata may in future complement extensive digital collections using IIIF to enable sharing, extending and blending collections globally. Complementing the impact of the IIIF in 2D and Audio/Video (A/V) digital collections around the world, the IIIF 3D Technical Specification Group (TSG) has a road map to draft standards for 3D content, incorporating established open web standards, to complement and expand the potential of all IIIF-based collections worldwide. Engaging with specialists and representatives across user communities, international and standards bodies, the TSG are expanding options for better data sharing across institutions, to help overcome barriers for sustainable digital collections. The planned changes to the IIIF Presentation API specification [2] will enable display and creative presentation of 3D resources using IIIF tools. Draft examples of updated IIIF Presentation documents encoding 3D resources, and related viewers that support these documents to display 3D web content, highlight enriched ways of storytelling and interacting by combining 3D, 2D and A/V.